Two new Omicron variants are spreading. Will they drive a new U.S. surge?
The subvariants BA.4 and BA.5 may dodge immunity, especially in unvaccinated people, possibly causing a spike in infections worldwide. New versions of Omicron are again causing a surge of COVID-19 cases in South Africa, and studies show that these new subvariants are so different from the original …
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Martin Morales flipped this story into Health Magazine•709d