CDC: Immunocompromised may need 4th COVID-19 vaccine shot

2021-10-27

The CDC said in updated guidelines that certain people with weakened immune systems who have received three doses of an mRNA COVID-19 vaccine may be candidates for a fourth dose at least six months after receiving the third shot. The statement applies to moderately to severely immunocompromised adults, including those with untreated or advanced HIV, people who are undergoing treatment for tumors or blood cancers, those who have received certain transplants, and patients who take high doses of immunosuppressants.

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