Coronavirus variant B.1.617 first seen in India now in US what to know

Coronavirus variant B.1.617 first seen in India now in US what to know It's here. Nobody seems that worried. It's sometimes called a "double mutant" because it has double the number of mutations as some earlier variants of the SARS-CoV-2 virus, which causes COVID-19. The concern at firstwas that might make it doubly dangerous. "The good news is, this doesn't appear to be the case. Having both mutations was no worse than having just one," said Dr. Charles Chiu, a professor and expert in viral genomics at the University of California, San Francisco.