Toni
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And that is assuming it can even work. We don't know that: we don't know that surviving an infection (almost) universally grants longterm immunity. Sure, it's a very reasonable assumption given what we know about similar viruses
I am not an immunologist... but I thought that coronoviruses generally don't confer long-term immunity...which is one of the barriers to a cure for the common cold? IIRC, common cold is predominantly comprised of coronaviruses and rhinoviruses.
The reason that we are not immune from colds is because the cold viruses (human rhinovirus) mutate frequently. So do influenza viruses which is why we need annual flu shots and because there are so many different kinds of influenza viruses circulating, it is impossible to predict with 100% accuracy which will be prevalent during any annual flu season.
It isn't known if this will be true of the corona virus causing the current pandemic but as Jokodo points out, other corona viruses seem to cause a immune response that lasts for a few years, at least.