What virus happened in 2013?
2009 H1N1 viruses predominated overall during the 2013-14 flu season, though influenza B viruses became the predominant virus nationally later in the season and caused an increase in influenza-like-illness in parts of the northeast especially.
What was the flu called in 2013?
Over the course of the entire 2012–2013 season, influenza A (H3N2) viruses predominated nationally, followed by influenza B viruses; 2009 influenza A (H1N1) viruses were identified less frequently. Influenza A viruses predominated until the end of February 2013, after which influenza B viruses were detected more often.
How many people died from the flu 2013-2014?
The overall burden of influenza for the 2013-2014 season was an estimated 30 million influenza illnesses, 13 million influenza-associated medical visits, 347,000 influenza-related hospitalizations, and 38,000 flu-associated deaths (Table: Estimated Influenza Disease Burden, by Season — United States, 2010-11 through …
How many people died of the flu in the US in 2014?
During the 2019-2020 flu season, around 22,000 people lost their lives to the disease….Number of influenza deaths in the United States from 2010 to 2020.
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What happened to the flu in 2020?
The U.S. is seeing historically low levels of influenza this season, which started in September 2020. This time last year, the national map of flu activity published by the CDC showed so many active cases that some states had burned right through red to a dark purple for “very high” activity.
Is influenza A SARS virus?
in English, Spanish. Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and Alphainfluenzavirus are RNA viruses that cause coronavirus disease-19 and influenza, respectively. Both viruses infect the respiratory tract, show similar symptoms, and use surface proteins to infect the host.
When did the flu start?
Five flu pandemics have occurred since 1900: the Spanish flu in 1918–1920, which was the most severe flu pandemic, the Asian flu in 1957, the Hong Kong flu in 1968, the Russian flu in 1977, and the swine flu pandemic in 2009.
Why is the flu not considered a pandemic?
Influenza viruses are constantly changing and producing new strains. Pandemics occur when a strain is so different from previous strains that few people, if any, are immune to it. This allows the new strain to spread widely and rapidly, affecting many hundreds of thousands of people worldwide. What is H1N1 flu?