The US has tested a grand total of 445 persons since the beginning of the outbreak, according to this CDC page updated today, Feb 26. https://www.cdc.gov/corona

The US has tested a grand total of 445 persons since the beginning of the outbreak, according to this CDC page updated today, Feb 26. https://www.cdc.gov/coronavirus/2019-ncov/cases-in-us.html https://www.cdc.gov/coronavirus/2019-ncov/cases-in-us.html For comparison South Korea is testing several thousands per day. To a lot of people it's pretty obvious that there are a lot of undiagnosed cases in the wild. They are not testing anyone unless you are coming from a known risk area, which means by definition they can't detect local community outbreaks.