Sinovac COVID-19 shot with Pfizer booster less effective against Omicron
December 31, 2021 (Reuters) – Sinovac’s two-dose COVID-19 vaccine followed by a booster Pfizer-BioNTech shot showed a lower immune response against the…
December 31, 2021 (Reuters) – Sinovac’s two-dose COVID-19 vaccine followed by a booster Pfizer-BioNTech shot showed a lower immune response against the…