On Wednesday, Pfizer said a booster dose of its COVID-19 vaccine may protect against the new omicron variant even though the initial two doses appear significantly less effective.
Pfizer and its partner BioNTech said lab tests showed a booster dose increased by 25-fold the level of so-called neutralizing antibodies against omicron.
Pfizer announced the preliminary laboratory data in a press release and it hasn't yet undergone scientific review. The companies already are working to create an omicron-specific vaccine in case it's needed.
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