U.S. Air Force 1st Lt. Allyson Black, a registered nurse, cares for Covid-19 patients in a makeshift ICU (Intensive Care Unit) at Harbor-UCLA Medical Center on January 21, 2021 in Torrance, California.
Mario Tama | Getty Images News | Getty Images
LONDON — Health experts have warned that even with restrictions the U.S. is likely to struggle to curb the spread of a highly-infectious coronavirus variant, underlining the importance of taking aggressive measures immediately to protect as many people as possible.
The variant, first discovered in the U.K and known as B.1.1.7., has an unusually high number of mutations and is associated with more efficient and rapid transmission.
There is no…