The Omicron subvariants BA.4 and BA.5 are spreading rapidly in the United States, but it’s not yet clear if they’ll trigger a new wave of infections or a surge in hospitalizations and deaths, experts say. The subvariants now account for 13% of new coronavirus cases nationwide, compared with 7.5% a week ago and 1% in…  read on >  read on >

As the U.S. Food and Drug Administration weighs banning the sale of menthol cigarettes, a new study strengthens the tie between mint-flavored tobacco and teen smoking. According to the survey, adolescents who began smoking using menthols tended to smoke an average of nearly three days more during a 30-day period than their peers who took…  read on >  read on >

Moderna announced Wednesday that its updated COVID-19 booster shot does a better job at thwarting the Omicron variant than the original version does. “We are thrilled to share the preliminary data analysis on mRNA-1273.214, which is the second demonstration of superiority of our bivalent booster platform against variants of concern and represents an innovation in…  read on >  read on >