“Preliminary laboratory research by Pfizer/BioNTech finds that a third booster shot of its COVID-19 vaccine successfully neutralizes—that is, blocks—the omicron variant of the virus from entering and infecting cells. The researchers tested the new variant against antibodies produced by people one month after they had been inoculated with a third booster dose of the Pfizer/BioNTech vaccine. They report that the boosted level of antibodies “provides a similar level of neutralizing antibodies to Omicron as is observed after two doses against wild-type and other variants that emerged before Omicron. These antibody levels are associated with high efficacy against both the wild-type virus and these variants.””
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“Keep firmly in mind that these are very preliminary laboratory results that need to be confirmed by real-world epidemiological evidence with respect to breakthrough infections and disease severity. Nevertheless, these results corroborate that people who have already gotten two doses of COVID-19 vaccines or have already recovered from a prior COVID-19 infection should go get a booster shot and that people who are not yet fully vaccinated should delay no further.
In case these lab results don’t hold up in the real world, vaccine makers are already working on tweaks to their inoculations that specifically target the omicron variant. The updated vaccines could become available as early as March 2022.”
https://reason.com/2021/12/08/booster-shoots-appear-to-offer-protection-against-omicron-covid-19-variant/