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How do they make influenza vaccine?

You may be surprised to know how long it takes to make a batch of influenza vaccine. Long before one year's influenza season is over, work is beginning on vaccine for the next year.

Influenza vaccine timeline

Image of Influenza Vaccine Timeline
Click to enlarge flu shot timeline

Click here to print the Influenza Vaccine Production Timeline

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This page last updated: 09-Mar-2007