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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.
Frequent hand washing and covering one's mouth and nose when coughing and sneezing reduce transmission, as does wearing a mask. Annual vaccination can help to provide protection against influenza. Influenza viruses, particularly influenza A virus, evolve quickly, so flu vaccines are updated regularly to match which influenza strains are in ...
What are the different types of influenza virus? There are four different types of influenza virus: A, B, C, and D. Influenza C usually causes only mild illness while D mostly affects animals ...
The 1946–1947 flu season was characterized by a previously unheard of phenomenon. The first influenza vaccine came into use in the 1940s. [41] [42] At this time, the vaccine contained a strain of H1N1 isolated in 1943, and this had been effective during the 1943–1944 and 1944–1945 seasons.
Sausage bread is an American food made of sausage and other ingredients rolled or enclosed in dough and cooked in an oven. [1]Sausage bread is typically made from pizza dough and includes Italian sausage, mozzarella cheese (or a similar substitute cheese) and other ingredients such as mushrooms, onions, other vegetables, and various herbs, spices and sauces depending on the recipe.
The 1889–1890 pandemic, often referred to as the Asiatic flu [53] or Russian flu, killed about 1 million people [54] [55] out of a world population of about 1.5 billion. It was long believed to be caused by an influenza A subtype (most often H2N2), but recent analysis largely brought on by the 2002-2004 SARS outbreak and the COVID-19 pandemic ...
Here’s where flu, COVID, RSV, and norovirus are spreading. Lindsey Leake. Updated January 13, 2025 at 12:12 PM. As you dive into your New Year’s resolutions, taking precautions to protect ...
Viral evolution is a subfield of evolutionary biology and virology that is specifically concerned with the evolution of viruses. [1] [2] Viruses have short generation times, and many—in particular RNA viruses—have relatively high mutation rates (on the order of one point mutation or more per genome per round of replication).