COVID Immunity Reinfection

The cluster discusses evidence of COVID-19 reinfection, the duration and effectiveness of natural immunity post-infection, antibody responses, and comparisons to other coronaviruses like SARS.

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Keywords

COV www.who immunity.html SARS www.wsj nytimes.com www.vox theguardian.com COVID PCR immunity infected infection covid sars immune antibodies evidence sars cov virus

Sample Comments

Jefro118 May 26, 2020 View on HN

Evidence from coronaviruses that cause common colds show the ability to be reinfected but even in that case immunity still lasts for months rather than days. In the case of a more severe disease like SARS, antibody responses have been found after 17 years. We don't know enough about Covid to make a good guess about immunity but it seems unlikely that someone could be reinfected days after recovering.

throwaway2048 Mar 20, 2020 View on HN

There is evidence that people can become re-infected, so antibodies aren't enough.

mattnewton Jul 17, 2022 View on HN

Why wouldn’t having Covid several times confer the same immunity as you having Covid once?

SomeoneFromCA Oct 17, 2020 View on HN

That "some immunity" is clearly insufficient, because people who actually got infected with Covid itself and then again with Covid, in many if not most cases have more severe symptoms. In fact, the scarce evidence suggests Covid might be a subject to Antibody Enhancement; that would mean that every next infection will get worse and worse. In any case, Coronaviruses have long be known to cause very short term immunity. Even more importantly, constant reinfection may debilitate the organ

thinkingemote Mar 18, 2020 View on HN

Its very likely and we kinda know that catching the virus gives short term immunity. Longer term is unknown.

Johnny555 Feb 27, 2020 View on HN

You seem to be assuming that once you get it you'll be immune. But there's some evidence that patients can be reinfected and the subsequent infection is worse.

claudeganon Jul 17, 2020 View on HN

There’s initial evidence of reinfection and limited immunity that are under further investigation:https://www.vox.com/2020/7/12/21321653/getting-covid-19-twic...<a href="https://www.theguardian.com/world/2020/jul/12/immunity-to-covid-19-could-be-lost-in-months-uk

wyldfire Jul 17, 2020 View on HN

I know you're joking, but I was surprised to learn [1] that there are cases pointing to the likelihood that recovery from infection will not necessarily lead to immunity from subsequent infection.[1] https://www.vox.com/2020/7/12/21321653/getting-covid-19-twic...

grandmczeb Apr 22, 2020 View on HN

All current evidence says infection confers temporary immunity to the vast majority of people infected. It’s not clear how long immunity lasts, but it’s most likely on the order of years. And even if you lose immunity, the reinfection will likely be more mild.https://www.wsj.com/articles/does-covid-19-infection-equal-i...

bosswipe Jul 25, 2020 View on HN

If people could get reinfected we would have heard of more of those cases by now. We can be pretty sure that it confers several months of immunity at minimum.