what is the vaccine for spanish flu ? which year it was invented
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The first approved version of the vaccine was administered to soldiers in 1945, during World War II. Civilians were able to get vaccinated the following year. Influenza viruses are able to mutate through antigenic drift and shift, which necessitates constantly adapting vaccine varieties.
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Answer:
H1N1 is the vaccine for spanish flu
Explanation:
year: 1918
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