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Just two years after influenza viruses were discovered, in 1933, influenza A virus was identified as the agent responsible for human influenza. [76] [81] Subtypes of influenza A virus were discovered throughout the 1930s, [77] and influenza B virus was discovered in 1940. [23]
Sir Christopher Howard Andrewes FRS (7 June 1896 – 31 December 1988) was a British virologist who discovered the human influenza A virus in 1933. Education
This is a timeline of influenza, briefly describing major events such as outbreaks, epidemics, pandemics, discoveries and developments of vaccines.In addition to specific year/period-related events, there is the seasonal flu that kills between 250,000 and 500,000 people every year and has claimed between 340 million and 1 billion human lives throughout history.
Influenza viruses A and B are estimated to have diverged from a single ancestor around 4,000 years ago, while the ancestor of influenza viruses A and B and the ancestor of influenza virus C are estimated to have diverged from a common ancestor around 8,000 years ago. [40] Outbreaks of influenza-like disease can be found throughout recorded history.
Flu vaccines protect against a set of influenza A and B variants every year, the experts say. "Every year, the community, including groups from CDC, work hard to do surveillance worldwide and ...
[21] [22] According to the World Health Organization, approximately 10 million new TB infections occur every year, and 1.5 million people die from it each year – making it the world's top infectious killer (before COVID-19 pandemic). [21] However, there is a lack of sources which describe major TB epidemics with definite time spans and death ...
Just over 50% of kids got the flu shot this season, slightly lower than 53.3% last year. Preliminary CDC data shows the vaccine is up to 61% effective in keeping kids with flu out of the hospital.
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