Cellular immunity to SARS-CoV2 found at 6 months in non-hospitalised individuals

Re:Cellular immunity to SARS-CoV2 found at 6 months in non-h... by nradov on Monday November 02, 2020 @09:19AM (#24968334)

It wouldn't imply anything of the sort. It's rare for a single viral infection to cause life long sterilizing immunity. Reinfections are possible with most viruses, including other coronaviruses. As long as your immune system is otherwise healthy the memory T cells will kick in and symptoms will usually be less severe.

The only reason that other coronaviruses like OC43 don't kill a lot of people is that almost everyone catches it first as a youth, and builds up a level of immunity. But it can be quite deadly to someone who first catches it later in life, or to immunocompromised patients.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7252012/

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Re:Cellular immunity to SARS-CoV2 found at 6 months in non-h... by brmgb on Monday November 02, 2020 @11:17AM (#24969700)

> The only reason that other coronaviruses like OC43 don't kill a lot of people is that almost everyone catches it first as a youth, and builds up a level of immunity. But it can be quite deadly to someone who first catches it later in life, or to immunocompromised patients.

As an aside, OC43 is strongly suspected to be the cause of the 1889-1890 pandemic which killed around 1 million.

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