KEY POINTS
  • White House chief medical advisor Dr. Anthony Fauci said studies strongly suggest that booster shots will give you cross protection against a "wide range" of Covid-19 variants, but noted it has not been proven yet.
  • Fauci said booster shots "markedly" increase antibody titers against variants of the virus.
  • Third shots also increase so-called memory B cells and T cells, a line of defense produced by the immune system to fend off a virus. 
Dr. Anthony Fauci speaks about the Omicron coronavirus variant during a press briefing at the White House in Washington, December 1, 2021.

White House chief medical advisor Dr. Anthony Fauci on Friday said lab studies strongly suggest that booster shots will give you cross protection against a "wide range" of Covid-19 variants, but noted it has not been proven yet.

Booster shots "markedly" increase antibody titers against variants of the virus, Fauci said at a White House press briefing Friday. Third shots also increase so-called memory B cells and T cells, a line of defense produced by the immune system to fend off a virus.