The new boosters are suited to two COVID-19 strains of the Omicron virus variant that represents the vast majority of infections, according to the FDA.
Test tube labelled "COVID-19 Omicron variant test positive" is seen in this illustration picture taken January 15, 2022.(photo credit: REUTERS/DADO RUVIC/FILE PHOTO)ByJUDY SIEGEL-ITZKOVICH
