I know little of virology. What is known as posted above is there is a least two strains. The second may be more contageous and is yet deadly to some.
I do not know if the Covid 19 is a mutant of the predecessor Sars and sure don't like the thought of researchers seeking treatment or vaccine may have to re-boot as some point down the road.
I hope treatment and vaccine will soon be at hand. some reports make me feel those thoughts may not materialize.