Very good to have this confirmation. When your immune system sees Omicron, it does better, later, against Delta as well!https://twitter.com/sigallab/status/1475584463941914635 …
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This repeated exposure/broadening optimization trick is amazing. Gradient descent, make way.
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Also note, Omicron is not a descendent of Delta—so that’s not what’s going on. Omicron evolved from a separate lineage. Still broadens immune response—similar to how vaccines with ancestral spike nowhere to be found anymore improve quantity and *quality* of the immune response.
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Replying to @zeynep
Is there a chance of a variant with severity of Delta and infectiousness of Omicron that will eventually come? Delticron sounds pretty scary.
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If you are vaccinated and/or infected—with repeated exposure preferably through the primary series/booster—your immune system is expected to help keep you from severe disease, on average—assuming immunocompetence.
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