More than 50% of the people infected with SARS-CoV-19 are asymptomatic (i.e. they have no illness).
They can identify the geographical origin of the strains by the genetic differences (mutations) between the different strains.
If we can find one of these non-pathogenic viral strains out in the wild we could give it to everyone in the world and solve our diabolic problem. This non-pathogenic strain would act much like the live attenuated (oral) polio vaccine.Source: A (possible) solution to COVID-19 – Daniel Tillett