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71-537: Birkebeinerrennet (lit. The Birkebeiner race) is a long-distance cross-country ski marathon held annually in Norway . It debuted in 1932 and has been a part of Worldloppet since Worldloppet's inception in 1979. The Birkebeinerrennet is one of three races held under the Birkebeiner moniker, the other two being Birkebeinerrittet (bicycling) and Birkebeinerløpet  [ no ] (cross-country running). The race

142-625: A healthy diet are also recommended. Supportive care in severe cases includes treatment to relieve symptoms , fluid therapy , oxygen support and prone positioning , and medications or devices to support other affected vital organs. More severe cases may need treatment in hospital. In those with low oxygen levels, use of the glucocorticoid dexamethasone is recommended to reduce mortality. Noninvasive ventilation and, ultimately, admission to an intensive care unit for mechanical ventilation may be required to support breathing. Extracorporeal membrane oxygenation (ECMO) has been used to address

213-615: A variant of concern (VoC) or a variant of interest (VoI). Many of these variants have shared the more infectious D614G . As of May 2023, the WHO had downgraded all variants of concern to previously circulating as these were no longer detected in new infections. Sub-lineages of the Omicron variant (BA.1 – BA.5) were considered separate VoCs by the WHO until they were downgraded in March 2023 as no longer widely circulating. As of 24 September 2024 ,

284-493: A comprehensive international study. Such deaths include deaths due to healthcare capacity constraints and priorities, as well as reluctance to seek care (to avoid possible infection). Further research may help distinguish the proportions directly caused by COVID-19 from those caused by indirect consequences of the pandemic. In May 2022, the WHO estimated the number of excess deaths by the end of 2021 to be 14.9 million compared to 5.4 million reported COVID-19 deaths, with

355-590: A large number of people". During the COVID-19 pandemic, as with other pandemics, the meaning of this term has been challenged. The end of a pandemic or other epidemic only rarely involves the total disappearance of a disease, and historically, much less attention has been given to defining the ends of epidemics than their beginnings. The ends of particular epidemics have been defined in a variety of ways, differing according to academic field, and differently based on location and social group. An epidemic's end can be considered

426-460: A long and perilous journey through treacherous mountains and forests. This is commemorated through cross-country ski races , Birkebeinerrennet and Birkebeinerrittet . The Civil war era in Norway ( borgerkrigstiden ) is a term used for the period between 1130 and 1240 in the history of Norway. During this period there were several interlocked conflicts of varying scale and intensity. Although weak in

497-448: A median range of 0.24% to 1.49%. IFRs rise as a function of age (from 0.002% at age 10 and 0.01% at age 25, to 0.4% at age 55, 1.4% at age 65, 4.6% at age 75, and 15% at age 85). These rates vary by a factor of ≈10,000 across the age groups. For comparison, the IFR for middle-aged adults is two orders of magnitude higher than the annualised risk of a fatal automobile accident and much higher than

568-582: A new faction called the Bagler . Around the year 1200, the rival groups shared the goal of controlling the entire country. In 1202, when King Sverre died, he had managed to acquire most of Norway, but in Østerdalen , the Baglers were still very powerful. Sverre's death meant some decrease in the power of the Birkebeins. His successor, King Haakon Sverresson , died only two years later, leaving his son Haakon Haakonsson as

639-815: A random sample have consistently found that total infections considerably exceed the reported case counts. Many countries, early on, had official policies to not test those with only mild symptoms. The strongest risk factors for severe illness are obesity, complications of diabetes , anxiety disorders, and the total number of conditions. During the start of the COVID-19 pandemic it was not clear whether young people were less likely to be infected, or less likely to develop symptoms and be tested. A retrospective cohort study in China found that children and adults were just as likely to be infected. Among more thorough studies, preliminary results from 9 April 2020 found that in Gangelt ,

710-878: A remembrance of the child the Birkebeiners had to carry on their journey. The bike and ski events start in Rena and all three events finish in Lillehammer . There are also sister cross-country ski races held in Hayward Wisconsin (United States) (the American Birkebeiner ), in Edmonton (Canada) (the Canadian Birkebeiner ) and in Falls Creek (Australia). COVID-19 pandemic The COVID-19 pandemic (also known as

781-457: A social phenomenon, not just a biological one. Time reported in March 2024 that expert opinions differ on whether or not COVID-19 is considered endemic or pandemic, and that the WHO continued to call the disease a pandemic on its website. During the initial outbreak in Wuhan , the virus and disease were commonly referred to as "coronavirus", "Wuhan coronavirus", "the coronavirus outbreak" and

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852-451: A test. Conversely, deaths of people who died from underlying conditions following a positive test may be included. Countries such as Belgium include deaths from suspected cases, including those without a test, thereby increasing counts. Official death counts have been claimed to underreport the actual death toll, because excess mortality (the number of deaths in a period compared to a long-term average) data show an increase in deaths that

923-518: Is associated with COVID-19 and is reported in as many as 88% of cases. The disease is mainly transmitted via the respiratory route when people inhale droplets and small airborne particles (that form an aerosol ) that infected people exhale as they breathe, talk, cough, sneeze, or sing. Infected people are more likely to transmit COVID-19 when they are physically close to other non-infected individuals. However, infection can occur over longer distances, particularly indoors. SARS‑CoV‑2 belongs to

994-503: Is discouraged altogether by the WHO, due to limited evidence of its efficacy. The severity of COVID-19 varies. It may take a mild course with few or no symptoms, resembling other common upper respiratory diseases such as the common cold . In 3–4% of cases (7.4% for those over age 65) symptoms are severe enough to cause hospitalisation. Mild cases typically recover within two weeks, while those with severe or critical diseases may take three to six weeks to recover. Among those who have died,

1065-439: Is intended to provide acquired immunity against severe acute respiratory syndrome coronavirus 2 (SARS‑CoV‑2), the virus that causes coronavirus disease 2019 ( COVID-19 ). Prior to the COVID-19 pandemic, an established body of knowledge existed about the structure and function of coronaviruses causing diseases like severe acute respiratory syndrome (SARS) and Middle East respiratory syndrome (MERS). This knowledge accelerated

1136-485: Is not explained by COVID-19 deaths alone. Using such data, estimates of the true number of deaths from COVID-19 worldwide have included a range from 18.2 to 33.5 million (≈27.4 million) by 18 November 2023 by The Economist , as well as over 18.5 million by 1 April 2023 by the Institute for Health Metrics and Evaluation and ≈18.2 million (earlier) deaths between 1 January 2020, and 31 December 2021, by

1207-452: Is the ratio of deaths to diagnoses. This metric can be misleading because of the delay between symptom onset and death and because testing focuses on symptomatic individuals. Based on Johns Hopkins University statistics, the global CFR was 1.02 percent (6,881,955 deaths for 676,609,955 cases) as of 10 March 2023. The number varies by region and has generally declined over time. Several variants have been named by WHO and labelled as

1278-406: Is the seventh known coronavirus to infect people, after 229E , NL63 , OC43 , HKU1 , MERS-CoV , and the original SARS-CoV . The standard method of testing for presence of SARS-CoV-2 is a nucleic acid test , which detects the presence of viral RNA fragments. As these tests detect RNA but not infectious virus, its "ability to determine duration of infectivity of patients is limited". The test

1349-614: Is typically done on respiratory samples obtained by a nasopharyngeal swab ; however, a nasal swab or sputum sample may also be used. The WHO has published several testing protocols for the disease. Preventive measures to reduce the chances of infection include getting vaccinated, staying at home or spending more time outdoors, avoiding crowded places, keeping distance from others, wearing a mask in public, ventilating indoor spaces, managing potential exposure durations, washing hands with soap and water often and for at least twenty seconds, practising good respiratory hygiene, and avoiding touching

1420-501: The Huanan Seafood Wholesale Market there, but it is possible that human-to-human transmission began earlier. Molecular clock analysis suggests that the first cases were likely to have been between October and November 2019. The scientific consensus is that the virus is most likely of a zoonotic origin, from bats or another closely related mammal. While other explanations such as speculations that SARS-CoV-2

1491-407: The Institute for Health Metrics and Evaluation estimating the true number of cases as of early 2022 to be in the billions. One measure that public health officials and policymakers have used to monitor the pandemic and guide decision-making is the test positivity rate ("percent positive"). According to Johns Hopkins in 2020, one benchmark for a "too high" per cent positive is 5%, which was used by

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1562-597: The basic reproduction number (R 0 ) for COVID-19 in January 2020 were between 1.4 and 2.5, but a subsequent analysis claimed that it may be about 5.7 (with a 95 per cent confidence interval of 3.8 to 8.9). In December 2021, the number of cases continued to climb due to several factors, including new COVID-19 variants. As of that 28   December, 282,790,822 individuals worldwide had been confirmed as infected. As of 14 April 2022 , over 500 million cases were confirmed globally. Most cases are unconfirmed, with

1633-474: The coronavirus pandemic and COVID pandemic ), caused by severe acute respiratory syndrome coronavirus 2 ( SARS-CoV-2 ), began with an outbreak of COVID-19 in Wuhan , China, in December 2019. It spread to other areas of Asia, and then worldwide in early 2020. The World Health Organization (WHO) declared the outbreak a public health emergency of international concern (PHEIC) on 30 January 2020, and assessed

1704-450: The variants of interest as specified by the WHO are BA.2.86 and JN.1, and the variants under monitoring are JN.1.7, KP.2, KP.3, KP.3.1.1, JN.1.18, LB.1, and XEC. Symptoms of COVID-19 are variable, ranging from mild symptoms to severe illness. Common symptoms include headache, loss of smell and taste , nasal congestion and runny nose , cough, muscle pain , sore throat , fever, diarrhoea , and breathing difficulties . People with

1775-429: The "Wuhan coronavirus outbreak", with the disease sometimes called "Wuhan pneumonia ". In January 2020, the WHO recommended 2019-nCoV and 2019-nCoV acute respiratory disease as interim names for the virus and disease per 2015 international guidelines against using geographical locations (e.g. Wuhan, China), animal species, or groups of people in disease and virus names in part to prevent social stigma . WHO finalised

1846-556: The 2011 race, the limit was set at 16,000. The following aid stations are present: The Birkebeinerrennet has been held since 1932, and commemorates a trip made by the Birkebeiner loyalists Torstein Skevla and Skjervald Skrukka to save the infant heir to the Norwegian throne , Håkon Håkonsson , in 1206. All participants carry a backpack weighing at least 3.5 kg, symbolizing the weight of

1917-428: The 542 AD ski to 5 m/s, compared to about 12 m/s for modern cross country skis; for long distance skiing (several hours) results were 3 and 7 m/s respectively. This corresponds to about 5 hours for the original 1206 AD Birkebeiner flight. The race starts at Rena and ends at Lillehammer , a distance of 54 kilometres (34 mi). The number of participants has been steadily increasing each year, and for

1988-436: The Birkebeiner movement was re-organized and pruned and the most criminal elements were brutally purged from the party. The army consisted more and more of mercenaries from Sweden and England . As early as 1177, Sverre was proclaimed king by his followers, but in reality his power did not extend beyond the borders of Trøndelag and it took two decisive battles in 1179 and 1184 before he could be formally elected king. By then, both

2059-601: The Birkebeins were dubbed several names, successively Lendsmenn , Heklungs , Kuvlungs , Øyskjeggs and Bagler . After some initial victories for the Viken party, the tables turned when Sverre entered the political scene claiming to be the illegitimate son of king Sigurd Munn . Sverre sought assistance from the Swedish earl Birger Brosa who sent him Swedish forces after some hesitation. One of Birger Brosa's sons, Philippus Birgersson, became Sverre's earl. Under Sverre's leadership,

2130-636: The WHO in the past. As of 10 March 2023, more than 6.88   million deaths had been attributed to COVID-19. The first confirmed death was in Wuhan on 9 January 2020. These numbers vary by region and over time, influenced by testing volume, healthcare system quality, treatment options, government response, time since the initial outbreak, and population characteristics, such as age, sex, and overall health. Multiple measures are used to quantify mortality. Official death counts typically include people who died after testing positive. Such counts exclude deaths without

2201-419: The WHO, US, European Union, and Australia. On 12 November 2022, the WHO released its Global Vaccine Market Report. The report indicated that "inequitable distribution is not unique to COVID-19 vaccines"; countries that are not economically strong struggle to obtain vaccines. On 14 November 2022, the first inhalable vaccine was introduced, developed by Chinese biopharmaceutical company CanSino Biologics , in

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2272-475: The beginning, the Birkebeiners had the upper hand for most of the conflict's duration. King Haakon IV was the ultimate victor for the Birkebeiners in 1217. In the earlier part of the reign of King Haakon, much of the royal power was in the hands of Skule Bårdsson . In 1239, the conflict between the two erupted into open warfare, when Skule had himself proclaimed king in Nidaros . The rebellion ended in 1240 when Skule

2343-448: The broad family of viruses known as coronaviruses . It is a positive-sense single-stranded RNA (+ssRNA) virus, with a single linear RNA segment. Coronaviruses infect humans, other mammals, including livestock and companion animals, and avian species. Human coronaviruses are capable of causing illnesses ranging from the common cold to more severe diseases such as Middle East respiratory syndrome (MERS, fatality rate ≈34%). SARS-CoV-2

2414-630: The centre of a major infection cluster in Germany, 15 per cent of a population sample tested positive for antibodies . Screening for COVID-19 in pregnant women in New York City , and blood donors in the Netherlands, found rates of positive antibody tests that indicated more infections than reported. Seroprevalence -based estimates are conservative as some studies show that persons with mild symptoms do not have detectable antibodies. Initial estimates of

2485-746: The city of Shanghai, China. For the first two years of the pandemic, no specific and effective treatment or cure was available. In 2021, the European Medicines Agency's (EMA) Committee for Medicinal Products for Human Use (CHMP) approved the oral antiviral protease inhibitor , Paxlovid (nirmatrelvir plus the HIV antiviral ritonavir ), to treat adult patients. FDA later gave it an EUA. Most cases of COVID-19 are mild. In these, supportive care includes medication such as paracetamol or NSAIDs to relieve symptoms (fever, body aches, cough), adequate intake of oral fluids and rest. Good personal hygiene and

2556-480: The cumulative number of infected individuals (including asymptomatic and undiagnosed infections and excluding vaccinated infected individuals). It is expressed in percentage points. Other studies refer to this metric as the infection fatality risk . In November 2020, a review article in Nature reported estimates of population-weighted IFRs for various countries, excluding deaths in elderly care facilities, and found

2627-564: The decision to cancel the event [1] . The race was also cancelled in 2014, only 15 minutes before the start due to high winds of 15 m/s. Despite the cancellation, thousands of skiers completed the route from Rena to Lillehammer (and from Lillehammer to Rena) and criticized the decision. The organizers also decided not to give any refunds, which caused an investigation by the Norwegian Skiing Federation. In 2015, conditions were good for skiing fast and new records were set in both

2698-441: The development of various vaccine platforms during early 2020. The initial focus of SARS-CoV-2 vaccines was on preventing symptomatic and severe illness. The COVID-19 vaccines are widely credited for their role in reducing the severity and death caused by COVID-19. As of March 2023, more than 5.5 billion people had received one or more doses (11.8 billion in total) in over 197 countries. The Oxford-AstraZeneca vaccine

2769-513: The eyes, nose, or mouth with unwashed hands. Those diagnosed with COVID-19 or who believe they may be infected are advised by healthcare authorities to stay home except to get medical care, call ahead before visiting a healthcare provider, wear a face mask before entering the healthcare provider's office and when in any room or vehicle with another person, cover coughs and sneezes with a tissue, regularly wash hands with soap and water and avoid sharing personal household items. A COVID-19 vaccine

2840-474: The general public beginning in December 2020, made available through government and international programs such as COVAX , aiming to provide vaccine equity . Treatments include novel antiviral drugs and symptom control. Common mitigation measures during the public health emergency included travel restrictions , lockdowns , business restrictions and closures, workplace hazard controls , mask mandates , quarantines, testing systems, and contact tracing of

2911-657: The infected. The pandemic caused severe social and economic disruption around the world, including the largest global recession since the Great Depression . Widespread supply shortages , including food shortages , were caused by supply chain disruptions and panic buying . Reduced human activity led to an unprecedented temporary decrease in pollution . Educational institutions and public areas were partially or fully closed in many jurisdictions, and many events were cancelled or postponed during 2020 and 2021. Telework became much more common for white-collar workers as

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2982-484: The issue of respiratory failure. Existing drugs such as hydroxychloroquine , lopinavir/ritonavir , and ivermectin are not recommended by US or European health authorities, as there is no good evidence they have any useful effect. The antiviral remdesivir is available in the US, Canada, Australia, and several other countries, with varying restrictions; however, it is not recommended for use with mechanical ventilation, and

3053-520: The journey are dramatised in The Last King . The Birkebeins managed to hold some power, despite short reigns of their monarchs. In 1209, a resolution was made between Bagler and Birkebeiner. Bagler pretender Philip Simonsson was recognized as ruler of the eastern third of the country, Østlandet , without the title of king. Birkebeiner's Inge Baardsson was recognized to be King of Norway. They both died in 1217 and Birkebeiner-born Haakon IV ascended

3124-442: The main opponents were dead, i.e., earl Erling (1179) and King Magnus Erlingsson (1184), and the opposition was greatly reduced. The Birkebeiner's political program was a continuation of earl Erling's centralization which underscores the geographical motivations behind the movement. Their leadership did not seek a social revolution, only to move the centre of power back to Trøndelag. The opposition around Viken organized in 1196 into

3195-576: The majority of the unreported 9.5 million deaths believed to be direct deaths due the virus, rather than indirect deaths. Some deaths were because people with other conditions could not access medical services . A December 2022 WHO study estimated excess deaths from the pandemic during 2020 and 2021, again concluding ≈14.8 million excess early deaths occurred, reaffirming and detailing their prior calculations from May as well as updating them, addressing criticisms. These numbers do not include measures like years of potential life lost and may make

3266-415: The men's and the women's classes. Petter Eliassen skied in 2 hours, 19 minutes and 28 seconds, more than two minutes faster than the previous record set by Anders Aukland in 2012. Therese Johaug skied the 2015 edition in 2 hours, 41 minutes and 46 seconds and set a new record for female skiers. The 2020 edition was cancelled due to the coronavirus pandemic . Course record in bold . In

3337-495: The official names COVID-19 and SARS-CoV-2 on 11 February 2020. Tedros Adhanom Ghebreyesus explained: CO   for corona , VI   for virus , D   for disease and 19 for when the outbreak was first identified (31 December 2019). WHO additionally uses "the COVID-19 virus" and "the virus responsible for COVID-19" in public communications. WHO named variants of concern and variants of interest using Greek letters . The initial practice of naming them according to where

3408-427: The outbreak as having become a pandemic on 11 March. COVID-19 symptoms range from asymptomatic to deadly, but most commonly include fever, sore throat , nocturnal cough , and fatigue. Transmission of the virus is often through airborne particles . Mutations have produced many strains (variants) with varying degrees of infectivity and virulence . COVID-19 vaccines were developed rapidly and deployed to

3479-407: The pandemic 2021's leading cause of death . The time between symptom onset and death ranges from   6 to 41 days, typically about 14 days. Mortality rates increase as a function of age. People at the greatest mortality risk are the elderly and those with underlying conditions. The infection fatality ratio (IFR) is the cumulative number of deaths attributed to the disease divided by

3550-491: The pandemic evolved. Misinformation circulated through social media and mass media , and political tensions intensified . The pandemic raised issues of racial and geographic discrimination , health equity , and the balance between public health imperatives and individual rights . The WHO ended the PHEIC for COVID-19 on 5 May 2023. The disease has continued to circulate, but as of 2024, experts were uncertain as to whether it

3621-410: The party. Today, the historic event of the rescue of Haakon Haakonsson is honoured in Norway by three annual sporting events, a run, Birkebeinerløpet ; a mountain bike race, Birkebeinerrittet ; a cross-country ski race, Birkebeinerrennet and, beginning in 2012, Landeveisbirken , a road bicycle race. Common for the bike and ski events is the requirement of carrying a backpack weighing 3.5 kg as

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3692-471: The population's age structure and the age-specific pattern of infections. There have also been reviews that have compared the fatality rate of this pandemic with prior pandemics, such as MERS-CoV. For comparison the infection mortality rate of seasonal flu in the United States is 0.1%, which is 13 times lower than COVID-19. Another metric in assessing death rate is the case fatality ratio (CFR), which

3763-443: The race was cancelled for the first time in history due to extremely high winds (90 km/h or 55 mph). However, at the time of cancellation, the event had been under way for nearly an hour, with roughly a quarter of the 13,000 competitors already on course. Despite the efforts of officials to send everyone back to the starting point, 55 competitors eventually reached the finish in Lillehammer , and upon being interviewed, blasted

3834-559: The race was included as the last event in the FIS World Cup . The World Cup class was won by Thomas Alsgaard and Anita Moen Guidon finishing in 2:24:08.7 and 2:43:39.1, respectively, faster than all records set prior to 2012 for men and prior to 2015 for women. However, the participants in the World Cup class were not required to carry the 3.5 kg backpack, and these times set in 2002 were therefore not considered as records. In 2007,

3905-487: The rich old settlements. It was this lawless population that became the foremost basis of the Birkebeiner, even though it is questionable whether their leaders were paupers wearing shoes made of birch bark. Their leadership came from Trøndelag , a region where the social tensions were not as marked, and their motive was rather to stop the transition of power from Trøndelag to Viken and Vestlandet . The powerful Trønder families were simply being left behind by their peers in

3976-458: The risk of dying from seasonal influenza . In December 2020, a systematic review and meta-analysis estimated that population-weighted IFR was 0.5% to 1% in some countries (France, Netherlands, New Zealand, and Portugal), 1% to 2% in other countries (Australia, England, Lithuania, and Spain), and about 2.5% in Italy. This study reported that most of the differences reflected corresponding differences in

4047-500: The rule of the king from the contesting party. The Birkebein party was formed of some earlier groups with the original goal of deposing king Magnus V of Norway (Magnus Erlingsson) and his father Earl Erling Skakke . From a socio-historical perspective, scholars have interpreted the party as the result of the rapid increase in landless markamenn (meaning "border men"), who settled along the Swedish border and made their living by pillaging

4118-496: The same infection may have different symptoms, and their symptoms may change over time. Three common clusters of symptoms have been identified: one respiratory symptom cluster with cough, sputum , shortness of breath, and fever; a musculoskeletal symptom cluster with muscle and joint pain, headache, and fatigue; a cluster of digestive symptoms with abdominal pain, vomiting, and diarrhoea. In people without prior ear, nose, and throat disorders, loss of taste combined with loss of smell

4189-511: The south, who had acquired a strong leader in the Vestland earl Erling Skakke in the mid-12th century. In the early 1160s, Erling had taken control of Viken and the bishopric of Nidaros and had subsequently made his underage son Magnus Erlingsson the king of Norway. The party that was behind their rule was not called the Bagli party ( Bagler ) during their time, but only later. The rival forces against

4260-484: The then one-year-old king. The inaugural edition was won by Trygve Beisvåg. An own class for women was established in 1976. Until 1991, the start city was alternated between Lillehamer (finish at Rena) and Rena (finish at Lillehamer). The last time that Birkebeinerrenet started at Lillehammer, the start was located on the site where the Lysgårdsbakken ski jumping arena were built for the 1994 Winter Olympics . In 2002,

4331-411: The throne, relatively unopposed, under the regency of Duke Skule . The city arms of Lillehammer show a Birkebeiner skiing in honour of the historic rescue. The mascots Håkon and Kristin of the 1994 Winter Olympics are depicted as Birkebeiner children, bearing the names of the son and daughter of king Sverre. Near Drammen , the sports association Idrettsforeningen Birkebeineren took their name from

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4402-411: The time from symptom onset to death has ranged from two to eight weeks. Prolonged prothrombin time and elevated C-reactive protein levels on admission to the hospital are associated with severe course of COVID-19 and with a transfer to intensive care units (ICU). Between 5% and 50% of COVID-19 patients experience long COVID , a condition characterised by long-term consequences persisting after

4473-694: The typical convalescence period of the disease. The most commonly reported clinical presentations are fatigue and memory problems, as well as malaise , headaches, shortness of breath , loss of smell, muscle weakness , low fever and cognitive dysfunction . Many countries attempted to slow or stop the spread of COVID-19 by recommending, mandating or prohibiting behaviour changes, while others relied primarily on providing information. Measures ranged from public advisories to stringent lockdowns. Outbreak control strategies are divided into elimination and mitigation. Experts differentiate between elimination strategies (known as " zero-COVID ") that aim to completely stop

4544-556: The ultimate target for the Baglers to get rid of the pretender to the throne. In 1206, the Birkebeiners set off on a dangerous journey through treacherous mountains and forests, taking the now one-year-old Haakon Haakonsson to safety in Trondheim . Norwegian history credits the Birkebeiners' bravery with preserving the life of the boy who later became King Haakon Haakonsson IV , ended the civil wars in 1240 and forever changing Northern Europe 's history through his reign. The events surrounding

4615-543: The variants were identified (e.g. Delta began as the " Indian variant") is no longer common. A more systematic naming scheme reflects the variant's PANGO lineage (e.g., Omicron 's lineage is B.1.1.529) and is used for other variants. SARS-CoV-2 is a virus closely related to bat coronaviruses , pangolin coronaviruses, and SARS-CoV . The first known outbreak (the 2019–2020 COVID-19 outbreak in mainland China ) started in Wuhan , Hubei, China, in December 2019. Many early cases were linked to people who had visited

4686-524: The week preceding Birkebeinerrennet, several cross-country skiing races are held during the Birken Ski Festival: [REDACTED] Media related to Birkebeinerrennet at Wikimedia Commons Birkebeiner Today, the Birkebeins are popularly celebrated for having escorted the one-year-old Haakon Haakonsson , an heir to the Norwegian throne, safely from Lillehammer to Østerdalen to Trondheim ,

4757-443: Was accidentally released from a laboratory have been proposed, as of 2021 these were not supported by evidence. Official "case" counts refer to the number of people who have been tested for COVID-19 and whose test has been confirmed positive according to official protocols whether or not they experienced symptomatic disease. Due to the effect of sampling bias , studies which obtain a more accurate number by extrapolating from

4828-516: Was inspired by a notable journey made by the Birkebeiner loyalists Torstein Skevla and Skjervald Skrukka to save the infant heir to the Norwegian throne , Håkon Håkonsson , in the winter of 1206. Researchers at the Manchester Metropolitan University found that the metabolic cost for modern ski models is about 2.5 J/kg*m as compared to about 5 J/kg*m for ski models dated 542 AD. They also estimated maximum cross country speed for

4899-431: Was put to death. The background for these conflicts was the unclear Norwegian succession laws , social conditions and the struggle between Church and King. There were then two main parties, firstly known by varying names or no names at all, but finally condensing into the parties of Bagler and Birkebeiners. The rallying point was regularly a royal son, who was set up as the figurehead of the party in question, to oppose

4970-457: Was still a pandemic. Pandemics and their ends are not well-defined, and whether or not one has ended differs according to the definition used. As of 30 November 2024, COVID-19 has caused 7,075,455 confirmed deaths. The COVID-19 pandemic ranks as the fifth- deadliest pandemic or epidemic in history . In epidemiology , a pandemic is defined as "an epidemic occurring over a very wide area, crossing international boundaries, and usually affecting

5041-502: Was the most widely used. According to a June 2022 study, COVID-19 vaccines prevented an additional 14.4 million to 19.8 million deaths in 185 countries and territories from 8 December 2020 to 8 December 2021. On 8 November 2022, the first recombinant protein-based COVID-19 vaccine (Novavax's booster Nuvaxovid ) was authorised for use in adults in the United Kingdom. It has subsequently received endorsement/authorisation from

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