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The most common side effects after getting the vaccines were headache, fatigue and dizziness, followed by chills and nausea. The CDC said people also reported muscle aches, fever, joint pain and pain at the injection site.

For the Pfizer vaccine, reactions were more frequent after the second dose than the first, according to the v-safe data. The CDC said the reported rate of fever and chills was more than four times higher after the second dose than after the first.

Medical experts say side effects for vaccines are common and are actually an indication the shots are working as intended. Many physicians are advising the public to brace for some stronger-than-usual side effects from the Covid-19 shots, especially after the second dose.

Both Pfizer and Moderna have acknowledged that their vaccines could induce side effects that are similar to symptoms associated with mild Covid-19, such as muscle pain, chills and headache. While the side effects may be unpleasant, physicians say the vaccines are safe.

The CDC recommends talking to a doctor about taking over-the-counter medicine if one experiences pain or discomfort after getting the shots.

Reference: CNBC