Explainer: Vaccination side effects and what they indicate

What Vaccine Side Effects Really Mean And is it bad not to have side effects after a shot? Jamie Ducharme TIME

Vaccine side effects like soreness, fever, and fatigue scare some people out of getting their shots. Ask a doctor, though, and they’ll tell you these unpleasant symptoms have a silver lining: they’re a signal that your immune system is firing up in response to the shot, doing exactly what it’s supposed to do.

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