Pfizer-BioNTech’s new bivalent Covid-19 vaccine—which targets the original strain and some Omicron subvariants—provides more protection against the virus and its omicron variants than its initial vaccine, according to a study released Friday.
Pfizer-BioNTech’s new bivalent Covid-19 vaccine—which targets the original strain and some Omicron subvariants—provides more protection against the virus and its omicron variants than its initial vaccine, according to a study released Friday.