WHO says it is analysing two new Omicron Covid sub-variants
ReutersThe World Health Organization (WHO) said on Monday it is tracking a few dozen cases of two new sub-variants of the highly transmissible Omicron strain of the coronavirus to assess whether they are more infectious or dangerous.
It has added BA.4 and BA.5, sister variants of the original BA.1 Omicron variant, to its list for monitoring.
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