joining us chief medical correspondent, dr. david campbell. if you hold a rally in new hampshire or exposed your staff or secret service to advanced teams for these rallies where people are not wearing masks, what what happens? >> the disease is transmitted. it's a virus we know that. what makes this harder to understand is just last week the cdc came out with a revised recommendation for testing that would have stopped those secret service agents from being tested because they were not with a known or recent exposure according to the new guidelines that are out now for about a week or so, just having been exposed to the virus or possibly being exposed to the virus isn't really enough reason to get tested. you have to have other reasons, such as feeling sick, having symptoms, having underlying health conditions or otherwise have a better reason to be