New Omicron Subvariants Fuel Surge In South Africa, Raising Concerns In US

The Los Angeles Times (5/3, Money) reports “a pair of new Omicron subvariants” – BA.4 and BA.5 – “has emerged, raising the possibility that survivors of earlier Omicron strains can get reinfected.” The subvariants “have gained increasing attention in Sout...