“Females are also more likely to have reactogenic symptoms than males.” “The younger you are, the more likely you are to have symptoms,” he says. But, he says, there are other factors at play. Something else to keep in mind, per Thomas Russo, M.D., professor and chief of infectious disease at the University at Buffalo in New York: The Moderna vaccine tends to be more likely to cause side effects than the Pfizer-BioNTech vaccine. “It’s unlikely there will be a major difference in side effects with Omicron-targeted boosters,” he says. Adalja, M.D., a senior scholar at the Johns Hopkins Center for Health Security. If you’ve already had a booster shot of a COVID-19 vaccine, you can expect more of the same potential side effects, says infectious disease expert Amesh A. Swelling in the lymph nodes in the same arm as the injection.Redness and swelling at the injection site.These are the most common ones you can expect with the Omicron booster vaccines, according to the FDA: Both bivalent vaccines target the original strain of SARS-CoV-2, along with Omicron subvariants (including BA.4 and BA.5, which are currently dominant in the U.S.).īut, of course, nearly everything in medicine has potential side effects. While the Omicron boosters have been lumped together, it’s important to point out that there are actually two options-a booster made by Moderna and one from Pfizer-BioNTech. So, what side effects can you expect with the Omicron booster? Experts break it down. However, the bivalent COVID-19 booster is slightly different-it has a tweaked code from previous booster shots and a lower dose than the primary vaccination shots. It’s important to note, though, that the FDA did a thorough review of the data before granting emergency use authorization to the vaccines.Īnd since you actually can’t get the Omicron booster if you’ve never been vaccinated against COVID-19 with an original vaccination series, you probably have at least some knowledge of COVID vaccine side effects. There isn’t a lot of data yet about the vaccines’ efficacy or side effects, but they’re designed to target the dominant Omicron subvariants, BA.4 and BA.5. That’s why it’s called a bivalent COVID-19 vaccine. If you’re headed to get yours, it’s only natural to wonder what the Omicron COVID booster side effects are, and what experts say to expect.īut before we dive into side effects, and in case you’re not familiar with this booster, it contains components of the original virus strain and the Omicron variant, per the Centers for Disease Control and Prevention (CDC). Now, the booster shot is widely available in major pharmacies like CVS and Walgreens, as well as primary care doctor’s offices. Earlier this month, the Food and Drug Administration (FDA) authorized the bivalent COVID-19 booster, also known as the Omicron COVID booster.
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