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A 40-year-old female asked about a female:

How much protection does my baby have 10 days after first flu shot? she will get booster june 1st?

1 doctor answer1 doctor weighed in
Dr. James Ferguson
Pediatrics 46 years experience
Building: The immune system takes 2-3 weeks to build immunity after any vaccine. Even after it has full force you should use common sense methods of flu avoidance because the vaccine may not protect against the strain circulating in your area.

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Last updated May 12, 2018

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