FDA

US tells pharmas to make Covid boosters targeting BA.4 and BA.5

US tells pharmas to make Covid boosters targeting BA.4 and BA.5

  • A panel of medical experts convened by the agency voted in favor of updating Covid vaccines against Omicron
  • BA.4 and BA.5, which are more transmissible and immune evasive, now comprise more than 52 percent of US Covid cases
By AFP ·