In 2020, many companies tried to develop effective coronavirus vaccines, but two ended up succeeding and dominating the field: Pfizer (NYSE: PFE) and Moderna (NASDAQ: MRNA). These two vaccine makers ...

Pfizer and Moderna, both coronavirus vaccine stars, now face declining demand -- and, as a result, declining revenue. But these top companies are expanding their growth potential with new candidates ...

A few years ago, both Pfizer (NYSE: PFE) and Moderna (NASDAQ: MRNA) were flying high: from an earnings and share performance perspective. They each sold a leading coronavirus vaccine -- and Pfizer ...

Shares in Pfizer and Moderna fell 3.9% and 7.4%, respectively, Friday after a report that the Trump administration plans to link the deaths of 25 children to COVID vaccines. Trump health officials ...