Does the flu vaccine work immediately after I am vaccinated?

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The flu vaccine does not work immediately after you are vaccinated. This varies somewhat from person to person, but you should expect it to take about 10 days after getting the flu shot until you have built up immunity against the flu.
It takes about two weeks after the flu vaccination for antibodies to develop in the body and provide protection against influenza virus infection. In the meantime, you are still at risk for getting the flu. That’s why it’s better to get vaccinated early in the fall, before the flu season really gets under way.

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Vaccine

Vaccines work to protect your body against germs. Because of vaccines, many of the diseases that can cause severe sickness, handicaps and death have been eradicated. Learn more from our experts about vaccines.

Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.