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Where did the first flu vaccine trials take place?

Quick Answer

Early influenza vaccine trials took place in the United States in the 1940s.

The Full Story

The first influenza vaccines were developed and tested in the United States during the 1940s. These early vaccines were a response to the serious threat posed by influenza outbreaks, especially after the 1918 pandemic. Influenza viruses change often, which is why flu vaccines are updated regularly. Annual vaccination remains the main way to reduce severe flu illness and complications.

Key Facts

1.Trials in the 1940s
2.Conducted in the United States
3.Flu vaccines are updated regularly

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"The modern flu shot began with wartime-era research in America."

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