Adverse effects after Covid-19 vaccine usually do not last more than 5 days. The first dose of Covid-19 (Pfeizer or Moderna) is less than 50% effective for protecting you after 2 weeks of the injection. You are still at risk for Covid-19 infection if you have been exposed. If you think you have the symptoms of Covid-19 infection, you need to self quarantine and get tested.
Answered 5/14/2021
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