The World Health Organization is investigating two new sub-variants of the highly contagious Omicron strain of COVID-19 to determine if they pose a greater risk.
The organization announced Monday it’s tracking a few dozen cases of BA.4 and BA.5, sister variants of the original BA.1 Omicron strain.
The WHO is keeping tabs on the two subvariants to determine whether they are more dangerous — or even more infectious — than previous strains because of their “additional mutations.”
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