WASHINGTON -- The Biden administration purchased an additional 200 million doses of Pfizer-BioNTech's COVID-19 vaccine to prepare for potential additional vaccine needs in the US, an administration ...

President Biden tested positive for COVID-19 on Wednesday, marking the third time in the past two years the president has tested positive for the virus. The White House on Wednesday said Biden was ...

Vaccine maker Pfizer says it’s already in regular communication with President-elect Joe Biden's transition team as part of ongoing efforts to keep all interested parties updated on its coronavirus ...