Experts say the transmission rates of the BA.2.75 variant are showing an exponential increase, particularly in India, where it is competing with BA.5. As the U.S. battles the rapidly spreading BA.5 omicron subvariant, a new mutant that could compete with the highly contagious strain is on the horizon. Scientists say the variant – called BA.2.75 – may be able to evade immunity from vaccines and prior infection. The latest mutant has been spotted in several distant states in India and appears to be spreading faster than other variants there. It’s unclear whether it could cause more serious disease than other...