Experts say 'explosive' COVID-19 spread is nearly impossible to contain without vaccine

With COVID-19 cases increasing in 46 states, 10 of which broke single-day records for new cases on Thursday, America has officially entered what experts refer to as the “exponential” phase of spread — a rapid multiplying of cases that can’t be contained through traditional measures. On Thursday alone, the U.S. saw 160,000 new cases of the virus, more than any day since the pandemic began.