"A newly-discovered mutation of the delta variant is under investigation in the U.K. amid worries that it could make the virus even more transmissible."
"A newly-discovered mutation of the delta variant is under investigation in the U.K. amid worries that it could make the virus even more transmissible."
>"A newly-discovered mutation of the delta variant is under investigation in the U.K. amid worries that it could make the virus even more transmissible."
>"A newly-discovered mutation of the delta variant is under investigation in the U.K. amid worries that it could make the virus even more transmissible."