This topic covers the F.D.A.'s proposed expansion of allowed e-cigarette flavors for adults while acknowledging the ongoing issue of illicit, candy-flavored vapes targeting teenagers.

• F.D.A. Opens Door to More Flavored E-Cigarettes — The New York Times Health -

This topic focuses on new research identifying common paths for viral outbreaks from animals to humans and the development of a tool to distinguish natural occurrences from lab accidents.

• Viral Outbreaks Take a Common Path from Animals to People, Study Finds — The New York Times Health -