US government scientists are pushing back against calls for one-dose regimens for the COVID-19 vaccines by Moderna and Pfizer, saying there isn’t enough evidence that a single dose provides long-term protection, The Wall Street Journal reported on Saturday.
“It is essential that these vaccines be used as authorized by FDA in order to prevent COVID-19 and related hospitalizations and death,” Peter Marks, director of the Food and Drug Administration’s center that oversees vaccines, told The Wall Street Journal.