Pfizer: Booster Shot Highly Effective Against Omicron

The New York Times reports:

Pfizer and BioNTech said Wednesday that laboratory tests suggest that three doses of their coronavirus vaccine offers significant protection against the fast-spreading Omicron variant of the virus.

The companies said that tests of blood from individuals who received only two doses found more than a 25-fold reduction in antibody levels against the Omicron variant compared to an earlier version of the virus. That finding indicates that two doses alone “may not be sufficient to protect against infection” by the new variant, the companies said.

But the blood samples obtained from people one month after they had received a booster shot showed neutralizing antibodies against the Omicron variant comparable to the levels of antibodies against a previous version of the virus after two doses, the companies said in a statement.

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