Omicron is likely not the last COVID-19 variant that will cause a “lot of concern,” the director of the National Institutes of Health warned on Sunday. Dr. Francis Collins said that the virus likely will continue to mutate from the
Omicron is likely not the last COVID-19 variant that will cause a “lot of concern,” the director of the National Institutes of Health warned on Sunday. Dr. Francis Collins said that the virus likely will continue to mutate from the