Dr. Rochelle Walensky, the head of the U.S. Centers for Disease Control and Prevention, said Monday that she is concerned about the virus’ variants and said the recent ground the country made in combating the disease could be lost.
Dr. Rochelle Walensky, the head of the U.S. Centers for Disease Control and Prevention, said Monday that she is concerned about the virus’ variants and said the recent ground the country made in combating the disease could be lost.
