Virus outbreaks are pushing some U.S. universities to reinstate mask mandates.
source:The New York Times 2022-04-12
[Medicine]
A small number of U.S. colleges and universities are reinstating mask policies, citing coronavirus outbreaks on campus. Their regulation changes come as a highly transmissible Omicron subvariant, known as BA.2, has become the dominant version among new U.S. cases, which are ticking up.