Tests of random individuals in Massachusetts who did not have symptoms, show that a third have already been infected with the Wuhan-virus and have formed antibodies, without getting sick. Hence, roughly a third of the population there is already immune, long before a vaccine has been developed. This is promising news as it shows that herd immunity is developing quicker than was believed so far. It also reveals how counterproductive the devastating lockdowns are.
https://www.rt.com/usa/486235-massachusetts-covid-19-antibody-study/