On Jan. 12, 2022, Pfizer announced positive top-line results from a Phase 3 study describing the safety and immunogenicity of PREVNAR 20 (Pneumococcal 20-valent Conjugate Vaccine) in 570 adults in the U.S. 65 years of age or older when administered at the same time as the Pfizer-BioNTech COVID-19 Vaccine or when each vaccine was given with placebo.

Responses elicited by PREVNAR 20 for all 20 serotypes were similar whether given with a dose of the Pfizer-BioNTech COVID-19 Vaccine (n=190) or with placebo (n=191). Responses to a booster dose of the Pfizer-BioNTech COVID-19 Vaccine were also similar when given with PREVNAR 20 or given with placebo (n=189). The safety profile of co-administering PREVNAR 20 with a booster dose of the Pfizer-BioNTech COVID-19 Vaccine generally reflected that observed with the Pfizer-BioNTech COVID-19 Vaccine booster dose.