Now That BA.5 Is Dominant, Stopping It Will Be Difficult
of all new COVID-19 cases, according to new estimates from the U.S. Centers for Disease Control and Prevention . That’s up 10 percentage points compared to the prior week.
The power of BA.5 is its ability to infect, and reinfect, almost anyone. This highly contagious strain can evade people’s built-up immunity, whether from vaccination or previous infection. Asreports, lab studies show that even people who have so-called “hybrid immunity” from vaccination and a past infection with the Omicron BA.1 strain are less able to ward off reinfection from either the BA.4 or BA.5 strains. Experts believe this is due largely to changes in the virus’ spike proteins.
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