KGO ABC World News Tonight With David Muir February 28, 2020 01:33:00
Spread through her community. the problem? since she had not traveled to the hot zone and did not know anyone infected, even after being placed on a ventilator at a local hospital, she was not tested for four days after showing symptoms. do residents need to be wearing masks right now? >> we do not believe so. >> reporter: but experts say valuable time has been lost. >> every single delay in testing means potentially the virus could go to hundreds or thousands more people. >> reporter: at this point, authorities say there are no connections to nearby travis air force base, which has housed ame...