The protection afforded against the Omicron COVID-19 variant fades quickly after a second and third dose of Pfizer-BioNtech’s vaccine, according to a peer-reviewed study published in the JAMA Network.
A Danish study published in JAMA Network on May 13 found there was a rapid decline in Omicron-specific serum neutralizing antibodies only a few weeks after the administration of the second and third doses of the vaccine.
The study evaluated 128 adults who were vaccinated, and of that number, 73 people received two doses of the Pfizer vaccine, and 55 received three doses between January 2021 and October 2021, or were previously infected before February 2021 and then vaccinated.
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