Reinfection is norm, not exception
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送交者: kma 于 2021-08-26, 09:06:27:
回答: 自然感染后天获得的免疫更优越 由 jhuang 于 2021-08-25, 22:31:51:
Shocked why scientists still not mention this. Common sense tell us so. Common cold, flu all so, why not COVID?
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