Then how come we see cases where there were no symptomatic patients nearby? Like this CDC screener, no cases where known in the entire state when the person con

Then how come we see cases where there were no symptomatic patients nearby? Like this CDC screener, no cases where known in the entire state when the person contracted the disease and it happened weeks ago: https://www.nbcnews.com/health/health-news/medical-screener-lax-airport-tests-positive-coronavirus-n1149986 https://www.nbcnews.com/health/health-news/medical-screener-... And this is not the first such case in USA. So either there are a ton of symptomatic Covid-19 patients in USA right now who are just thought to have the flu, or Covid-19 can spread just fine from asymptomatic people and that was how it spread to the well protected CDC personnel in the airport. And if an expert who follows all hygiene standards and wearing gloves and N95 respirators got it from an asymptomatic person, imagine how many other people at the Airport must have gotten it as well? And how many persons the carrier infected after arriving in USA? I am all but certain that the statement "We can contain it" is a lie at this point, I don't see how anyone can believe that. At least not without aggressively doing complete lockdowns of large communities before we even confirm cases, but I feel it is too late even for that now.