The Biden administration plans to offer updated booster shots in the fall. Mario Tama/Getty Images hide caption
2nd boosters
Thursday
Tuesday
The FDA is trying to make "bivalent" COVID vaccines, which target two different antigens, available as soon as September. Robyn Beck/AFP via Getty Images hide caption
Reformulated COVID vaccine boosters may be available earlier than expected
Tuesday
US President Joe Biden receives a second booster shot of the Pfizer Covid-19 vaccine a day after the US authorized a fourth dose of either the Pfizer-BioNTech or Moderna Covid-19 vaccines for people 50 and older NICHOLAS KAMM / AFP via Getty Images hide caption
Wednesday
The FDA has authorized second booster shots for people over 50 and for some people who are immunocompromised. Justin Sullivan/Getty Images hide caption