Pfizer hired 600 employees in the months after its COVID-19 vaccine was authorized in the United States due to the “large increase” of reports of side effects linked to the vaccine, according to a document prepared by the company.Pfizer has “taken a multiple actions to help alleviate the large increase of adverse event reports,” according to the document. “This includes significant technology enhancements, and process and workflow solutions, as well as increasing the number of data entry and case processing colleagues.”At the time when the document—from the first quarter of 2021—was sent to the U.S. Food and Drug Administration (FDA),...