Yelena Gasich noted that the both Omicron subvariants appeared almost simultaneously. Initially, there was a surge in BA.1 but then it began to be gradually replaced by its descendant BA.2.
“Firstly, these subvariants have a slightly different set of mutations, and secondly, they have somewhat different clinical manifestations. The first subvariant does not cause the loss of smell, but affects the upper respiratory tract, and has fairly mild symptoms. The Stealth subvariant causes less severe disease, but spreads faster,” the head of the laboratory said.
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