WHO says omicron BA.4 and BA.5 subvariants have spread to over a dozen countries

coronavirus impact business and economy Mf3d | E+ | Getty Images Omicron subvariants BA.4 and BA.5 have been detected in more than a dozen countries, helping fuel sporadic Covid outbreaks across the w...

WHO tracks omicron BA.4 and BA.5 subvariants as they spread through Africa and Europe

Omicron subvariants BA.4 and BA.5 are circulating at low levels in several countries within Southern Africa and Europe, according to the World Health Organization.  The two subvariants of the highly c...