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Omicron Boosters Are Coming, But They Weren’t Tested on People. Here’s What You Need to Know

2022-08-26 8 Dailymotion

COVID-19 vaccines tweaked to better match today's omicron threat are expected to roll out in a few weeks, but it's still unclear how much benefit the booster shots will offer, who should get one and how soon.<br /><br />Pfizer and rival Moderna both asked U.S. regulators this week to authorize modified versions of their booster vaccine — shots that are half the original recipe and half offer protection against BA.4 and BA.5, the newest versions of omicron.<br /><br />The Food and Drug Administration ordered that recipe and now is evaluating what scientists call a "bivalent vaccine," with a decision expected soon.

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