Quote:
Originally Posted by Taf
Omicron killed 280 people in Hong Kong on Monday, and there's been 450,000 cases since February 15. Before Omicron, the city had only 50,000 since the start of the pandemic.
All recent cases have been of a slightly mutated strain of the BA2 form of the disease which tweaks the amino acid profile in one of the Covid virus cell spike proteins.
The mutation, dubbed BA2.2, is almost unique to Hong Kong at this stage, but has also been seen in small numbers in the UK, Singapore and Australia.
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I believe it was established a while ago that earlier covid variants cause the human body to develop a very decent t-cell immune response that is later effective against omicron. Populations that managed to avoid previous covid waves are likely to be at higher risk now.