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COVID spreads in China

Unexpected Elements

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Omicron

We think the person probably had a little bit of an immune response, which is why there were so many mutations. The BA lineage potentially all arose within a single host. So that's what happened with omicron and they got out multiple times. We know that some very long-term chronic infections,. you know, the person can be almost asymptomatic and as they get tested, never know that they had a chronic infection.

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