Vaccine makers are racing to update their COVID-19 shots to be a better match against the Omicron variant, just in case.
Vaccine makers are racing to update their COVID-19 shots so they’re a better match against the Omicron variant, the newest coronavirus threat. It’s not yet clear that a change will be needed, but they’re putting in the work — just in case.
this week were mixed: Preliminary lab tests suggest two Pfizer doses may not prevent an Omicron infection but they could protect against severe illness. And a booster shot may rev up immunity enough to do both.Better answers are expected in the coming weeks, and regulators in the U.S. and other countries are keeping a close watch.
It’s a tough decision — and the virus moves faster than science. Just this fall the U.S. government’s vaccine advisers wondered why boosters weren’t retooled to target the highly transmissible Delta variant — only to have the next scary variant, Omicron, be neither a Delta descendant nor a very close cousin.
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