Coronavirus vaccines developed on an mRNA technology, like those from Pfizer and Moderna, are “highly effective,” in tamping down asymptomatic infections, according to findings posted Monday by the Centers for Disease Control and Prevention.

Coronavirus vaccines developed on an mRNA technology, like those from Pfizer and Moderna, are “highly effective,” in tamping down asymptomatic infections, according to findings posted Monday by the Centers for Disease Control and Prevention.