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The 1918–1920 flu pandemic, also known as the Great Influenza epidemic or by the common misnomer Spanish flu, was an exceptionally deadly global influenza pandemic caused by the H1N1 subtype of the influenza A virus.
D04536. Influenza vaccines, colloquially known as flu shots[14] or the flu jab, [15] are vaccines that protect against infection by influenza viruses. [16][17] New versions of the vaccines are developed twice a year, as the influenza virus rapidly changes. [16] While their effectiveness varies from year to year, most provide modest to high ...
12 paź 2010 · The Spanish flu pandemic of 1918-1919 was the deadliest pandemic in world history, infecting some 500 million people across the globe—roughly one-third of the population—and causing up to...
In 1942, a new bivalent vaccine was developed that protected against both the H1N1 strain of influenza A and the newly discovered influenza B virus. During the 1947 flu season, researchers discovered that existing vaccines were ineffective against the flu viruses circulating at the time.
20 paź 2024 · Influenza pandemic of 1918–19, the most severe influenza outbreak of the 20th century and among the most devastating pandemics in human history. The outbreak was caused by influenza type A subtype H1N1 virus. Learn about the origins, spread, and impact of the influenza pandemic of 1918–19.
However, vaccines against these very small agents, which they called viruses, had already been developed going back to the smallpox vaccine in late eighteenth century. Richard Shope, who demonstrated that the 1918 pandemic was caused by a virus, and connected the human and swine flu viruses.
In 1936, H1N1, the strain of the influenza responsible for the pandemic, was isolated in a laboratory beginning the path towards a vaccine, which was first tested, again in the context of war, on U.S. soldiers during World War II.
