Airport-based study found first U.S. case of BA.2 subvariant of omicron in December
March 25, 2022 at 09:29 AM EDT
An airport-based COVID-19 surveillance program detected the first known U.S. case of the highly transmissible omicron BA.2 subvariant in December, according to a new study that was funded by the Centers for Disease Control and Prevention.
