Pfizer Responds to Research Claims
Pfizer
JANUARY 27, 2023
A transient decrease in body weight was observed in the nursing offspring of rats administered nirmatrelvir. Contraception: Use of ritonavir may reduce the efficacy of combined hormonal contraceptives. IMPORTANT SAFETY INFORMATION Pfizer-BioNTech COVID-19 Vaccine, Bivalent (Original and Omicron BA.4/BA.5),
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