3 ms·

They know for sure, but they don't know for sure how long the immunity lasts. For some people at least, it doesn't last very long.

• seppel 7y ago
  And the virus is mutating.
  • arcticbull 7y ago
    [citation needed]. I'm not saying it can't I'm just saying it hasn't yet.
    • markdown 7y ago
      https://www.straitstimes.com/singapore/health/coronavirus-no-evidence-yet-that-different-types-of-virus-could-affect-severity-of https://www.straitstimes.com/singapore/health/coronavirus-no...
      • deleted 7y ago
        [deleted]
    • seppel 7y ago
      Here is a nice picture with all the mutations and how they (most likely) relate to each other: https://nextstrain.org/ncov https://nextstrain.org/ncov See also: https://www.sciencemag.org/news/2020/03/mutations-can-reveal-how-coronavirus-moves-they-re-easy-overinterpret https://www.sciencemag.org/news/2020/03/mutations-can-reveal...