Susan C. Olmstead

Second and third doses of Pfizer’s COVID-19 vaccine provide protection against the Omicron variant for only a few weeks, according to peer-reviewed research published today in JAMA Network Open.

“Our study found a rapid decline in Omicron-specific serum neutralizing antibody titers only a few weeks after the second and third doses of [the Pfizer-BioNTech] BNT162b2,” the authors of the research letter wrote.