In August, the Food and Drug Administration authorized updated vaccines against COVID-19. Here's what to know about the three vaccines available in the U.S.

Days after Pfizer and BioNTech reported surprisingly strong sales of their updated COVID-19 vaccines, Moderna has done the same. | Days after Pfizer and BioNTech reported surprisingly strong sales of their updated COVID-19 vaccines,

Novavax cut its annual revenue forecast on Tuesday, citing lower-than-expected sales of its COVID-19 vaccine, ahead of handing over the rights to sell the shot to Sanofi. The U.S. vaccine maker now expects between $175 million and $225 million for full-year sales of its COVID vaccine,

The FDA agreed for Novavax to continue trials of its vaccine combo after addressing a serious adverse event that paused trials.

Novavax has made a smaller splash in the U.S. Covid-19 vaccine market than it had hoped. But it's betting on licensing deals and a pipeline of new vaccines it's now evaluating for R&D.