Bivalent COVID-19 Booster
The new formulation is designed to protect against the coronavirus circulating now, but will it feel different.
Andrew Pekosz, a virologist at the Johns Hopkins Bloomberg School of Public Health, said the bivalent booster's side effects were similar to the regular booster and initial vaccination.
Redness at the injection site, soreness, and fatigue are common side effects of the bivalent booster.
According to the CDC, other common COVID-19 vaccine side effects in adults include headaches, fever, chills, and nausea.
In children, side effects vary.
Young children, ages 6 months to 3 years, may also experience swollen lymph nodes, irritability, sleepiness, or appetite loss.
Two bivalent COVID-19 boosters are FDA-approved. Moderna is for adults, while Pfizer is for those 12 and older.
It's hard to say how much better these boosters will protect us from the virus than the last version because human tests just started.