If this is the "first case" of reinfection (more likely a matter of the original infection laying dormant) then it suggests, given that some people have had this since December last year, that antibodies produced gives a lot longer than 'a few months' immunity.
The evidence does appear to be mounting that we'll see different strains of this virus; less deadly but more infectious in some cases. The autumn/winter flu period will complicate matters though.
Just a layman interpreting recent developments.
Not sure we can draw any conclusions, on long term immunity mate, most research indicates a drop in anti body levels as time has gone on which suggest antibody immunity might not be lasting without a vaccine. That said T Cells are different they are different to antibodies and cells produced by the body to attack a previous virus we have had previously (muscle memory) there is a hope these t cells may provide protection beyond anti bodies, to fight a reinfection, indeed it might be why some people get this virus more profoundly then others. Those two facets are subjective of course based on a number of factors of the severity of the infection initially. A lot is still emerging to draw conclusions on our natural response to this. If i had he virus i wouldn't be going around thinking i was immune.
The nature of virus's is they mutate to stay alive so its highly likely, in fact i think different strains have already been identified, there is every possibility it can become more virilant but also more benign - essentially a virus that kills is a useless virus, because the virus primary objective is to stay alive and spread. Beyond that then we are seeing a decrease i think certainly in the death rate around the world, certainly in developed countries, that might be due to a number of factors, better knowledge, environmental measures but also i think better treatment then we had in March-May giving a better chance of recovery for those who are critical, dex (steroid) was a great breakthrough in my opinion, with new research and treatments emerging all the time, we are getting better at treating this.
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