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Pfizer says COVID booster protects against omicron

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Pfizer says a booster dose of its COVID-19 vaccine appears to offer important protection against the new omicron variant. Pfizer and its partner BioNTech tested how well vaccine-produced antibodies could neutralize omicron in lab dishes. They found significant weakening after the standard two doses. But a booster dose increased antibody levels by 25-fold.


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