The United States is also tracking infections in people who have been fully vaccinated, Rochelle Walensky, director of the US Centres of Disease Control and Prevention told the House subcommittee hearing.
United States e ntse gape e sala morago ditshwaetsego mo bathong ba ba entileng ka botlalo, Rochelle Walensky, Mokaedi wa Senthara ya go laola le go thibela malwetse kwa US o boleletse komitipotlana ya ntlo ya theetso.