Trump responds after his valet tests positive for coronavirus

President Donald Trump told reporters Thursday that he'd had "very little contact, personal contact" with one of his personal valets who recently tested positive for COVID-19.
"I've had very little contact, personal contact with him, this gentleman. I know who he is, good person," he said during a meeting at the White House with Texas Gov. Greg Abbott.
The White House did not say when the valet developed symptoms or when the president was last exposed to the individual, who works in the West Wing serving the president his meals among other duties. 
When asked why he he thinks it possible to be close to someone without getting the virus, Trump responded: "Testing isn't a perfect art."
The White House said it would be increasing testing from weekly to daily. Trump also said he and Pence had tested negative both Wednesday and Thursday.