Opinion | Should Future COVID Boosters Include the Ancestral Strain?
The current COVID-19 mRNA vaccine boosters are bivalent, meaning they contain equal amounts of spike protein mRNA for the original Wuhan virus sequence and for the BA.4/5 Omicron variants that emerged in mid-2022. How well does this type of bivalent booster perform? The question is relevant because FDA’s recent Vaccines and Related Biological Products Advisory […]