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This is a good question I've been also trying to get an answer to, and I've never had a reason to ask before now: with the seasonal flu drive are we often reusi
by vmception 5y ago
This is a good question I've been also trying to get an answer to, and I've never had a reason to ask before now: with the seasonal flu drive are we often reusing a prior season's flu vaccine? I always assumed they developed new ones all the time, is the answer "it depends"?
- nradov 5y agoSeasonal flu vaccines are reformulated every year based on the circulating virus strains. Leftover doses from the previous season are discarded, not reused. https://www.cdc.gov/flu/prevent/flushot.htm https://www.cdc.gov/flu/prevent/flushot.htm