What Is the Definition of Fully Vaccinated? CDC Director Opens Door to Potential Changes


The Centers for Disease Control and Prevention (CDC) said the definition of “fully vaccinated” could change to require booster doses. In this photo illustration, a medical syringe and vials of the Pfizer US pharmaceutical corporation and BioNTech German biotechnology 2021 company logos are seen on October 3 in New York City.

In the case of the two-dose vaccination series, a person must receive the second dose of the same vaccine they initially were given. However, the CDC has authorized people to choose the vaccine they want to receive as their third dose. The CDC noted that some people will opt to stick with their original vaccine and some may choose to go with a different vaccine for their booster.

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