Testing does nothing to address infection rates. Either you have the infrastructure in place to isolate spreaders or you have no alternative to nip the epidemic

Testing does nothing to address infection rates. Either you have the infrastructure in place to isolate spreaders or you have no alternative to nip the epidemic in the bud by quaranting everyone. The first option is not on the table with covid19 because asymptomatic and presymptomaric carriers can walk freely among us weeks at a time without anyone having a clue.