Why some shots, like the COVID-19 vaccine, need boosters

Name: Why some shots, like the COVID-19 vaccine, need boosters
Uploaded: 2021-08-19T02:53:38Z
Duration: 3 min 48 s
Description: Health officials are directing people to receive a COVID-19 booster shot amid signs the vaccine’s effectiveness may wear off over time, which is not uncommon among certain vaccines.

Health officials are directing people to receive a COVID-19 booster shot amid signs the vaccine’s effectiveness may wear off over time, which is not uncommon among certain vaccines.

Posted August 18, 2021 9:53pm CDT