Wall Street Journal says regulator could authorize fourth shots of Pfizer and Moderna vaccines by the fall
US health regulators are looking at authorizing a potential fourth dose of a Covid-19 vaccine in the fall, the Wall Street Journal reported on Saturday, citing sources familiar with the matter.
The Food and Drug Administration (FDA) has been reviewing data to authorize a second booster dose of vaccines from Pfizer and BioNTech and Moderna, the report added.
