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Is it common to experience severe side effects from COVID-19 vaccines?

Monday, June 20, 2022
By Lisa Freedland
NO

Data indicate that severe side effects from the COVID-19 vaccine are very rare. Most people experience mild or no side effects.

According to the Centers for Disease Control:

  • Approximately five cases of anaphylaxis have occurred per one million doses administered.
  • Approximately four cases of thrombosis (blood clots) with thrombocytopenia syndrome have occurred per one million doses administered.
  • An average of about 77 cases of myocarditis (heart inflammation) have occurred per one million doses administered in individuals aged 12-24.

JAMA researchers found that between 0.2% and 0.3% of vaccine recipients experience allergic reactions.

Science magazine reported that in rare cases, the vaccines may cause "long covid-like symptoms." How frequently these side effects occur is unclear given that such cases are difficult to diagnose and are not being publicly tracked.

Clinical trial results suggest COVID-19 vaccines are safe for people with HIV.

This fact brief is responsive to conversations such as this one.
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