https://www.discovermagazine.com/health/covid-19-antibody-testing-tougher-than-true-false
COVID-19 Antibody Testing: Tougher Than True/False
It is always easy to point out why things won't work. There is always a chance that things won't work. There is also a pretty good chance that things can work, like flight, sending people to the moon, and detecting gravity waves.
And all the crap about mutations? If the virus mutates, it isn't the same any more, therefore your antibodies won't work and it will come around again as a different virus and reinfect you. This is another defeatist argument. Most mutations do not help an organism to survive. Each mutation happens in an individual virion, and then would have to multiply as its own virus to be a threat. That would be a new patient zero for every mutation.
If we are going to be paralyzed by fear, perhaps we should distribute tanks of carbon monoxide so people can just end their lives and not have to live with the possibility of dying. The only way a virus can kill you is if you are not already dead.