Experts discuss BA.2's transmissibility, severity and more.
“It’s still a minority cause of all the infections that we’re experiencing now,” Ko said. “But because of that increased transmissibility, it appears likely that it’s going to take over.” And Dittmer said he expects it to be the cause of the majority of COVID-19 infections in the U.S. within the next four to eight weeks.It’s too early to know for sure, but early data indicate that BA.2 isn’t likely to cause more severe disease than omicron.
In areas of the world where BA.2 is taking over, “you’re not seeing large increases in hospitalizations and deaths,” Ko said. “So that kind of reassures us that it may not be more virulent. But we really need much more waiting, much more rigorous data,” he said.,” Dittmer said. According to the one published report from Denmark, the BA.2 variant appears to be more transmissible than omicron but no less severe, he said, “but that’s like three weeks’ worth of observations.
It will take at least a few more weeks for other research to corroborate those findings in other parts of the world, Ko explained.It’s unlikely that we’ll see another major surge due to BA.2, but the emergence of this variant may result in “prolonged transmission” of the current omicron wave, Ko said.
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