People who get a COVID-19 vaccine booster shot can expect side effects not unlike those from the second dose, according to the Centers for Disease Control and Prevention.
A CDC study based on about 22,000 booster recipients found that common side effects included mild or moderate arm pain, fatigue and headache, NBC News reported.
The effects occurred generally the day after an injection and 28% of people said they were unable to perform normal daily activities because of them, the study said.
Most of the study’s respondents said they initially got the Pfizer or the Moderna vaccine, and nearly all got the same brand for their booster shot, NBC reported.
So far, roughly 2.8 million Americans have received a booster shot since mid-August, when additional doses of the Pfizer and Moderna vaccines were authorized for immunocompromised people.
Last week, the CDC also recommended a third shot of the Pfizer vaccine for certain at-risk groups, including those 65 and older and workers in high-risk settings. President Biden, who is 78, received a booster shot Monday at the White House.