Cold viruses naturally mutate in the wild, and these mutations trend away from lethality. Herd immunity is the result. Notice our stuff is backlogged in container ships awaiting unloading at port. Covid has a half life of 18 hours on a shaded surface. As a result the viral numbers drop roughly tenfold every 72 hours. If someone coughs and spits out 1,000,000 virus particles on a T shirt, then puts it in a box, the 1 million virus particles becomes 4000 after 6 days, and only 15 particles after 12 days in the box. You hear about 21 days quarantine - the amount of time for the virus to die off from contaminated items. All of those containers are now parked for weeks. They are not calling the backlog a quarantine - but it is serving as a quarantine.