Also we know antibodies persist 6+ years for MERS (another pesky novel coronavirus). Can’t assume this will directly correspond to SARS-CoV-2 (still early) but SARS and MERS are the two closest examples we have. https://wwwnc.cdc.gov/eid/article/27/5/20-4056_article …
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It definitely doesn’t. T cell “response” doesn’t equal T cell effective immunity. At all. If there was any lasting T cell immunity, we would not be seeing massive reinfections in Brazil & India.
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Not at all clear to me we're seeing massive reinfections in either place. We never had good serosurveys for either.
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All I know is the 1969 Hong King flu was brutal. I presume it provides no protection against this stuff.
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Last March, there was a lot of talk about immunity from coronaviruses only lasting a year - to your knowledge, was that based on any science, or was it just more talk?
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That was based on susceptibility to reinfection but not an indication of how long protection from severe disease would last.
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And outcomes from the Pacific Rim & Africa w/regard to COVID seem consistent with this
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As well as central asia/middle east, with mers
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