4 ms·

Unless it isn't. I thought that ~15% of common cold infections come from Coronavirii - wouldn't that imply that these 15% should cease to exist at a point in ti

• anoncake 6y ago
  There are a lot of different strains causing the common cold.
• nradov 6y ago
  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/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7252012/
  • brmgb 6y ago
    > 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.
• asaph 6y ago
  The plural of virus is viruses, not virii. Reference: https://english.stackexchange.com/questions/3838/viruses-or-virii https://english.stackexchange.com/questions/3838/viruses-or-...
• pertymcpert 6y ago
  Viruses.