The White House on Thursday disclosed that a member of the US Navy who serves as one of President Donald Trump's personal valets has tested positive for coronavirus, raising concerns about the President's possible exposure to the virus.

The valets are members of an elite military unit dedicated to the White House and often work very close to the President and first family.

Trump was upset when he was informed Wednesday that the valet had tested positive and the President was subsequently tested again by the White House physician.

White House spokesman Hogan Gidley said in a statement, “We were recently notified by the White House Medical Unit that a member of the United States Military, who works on the White House campus, has tested positive for Coronavirus."

He added, "The President and the Vice President have since tested negative for the virus and they remain in great health."

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Valets assist the President and first family with a variety of personal tasks. They are responsible for the President's food and beverage not only in the West Wing but also travel with him when he's on the road or out of the country.

Past presidents have relied on them not only for these matters, but also as confidants. The valets have an inside view to a president's personal life like few others.

A White House source said the valet, a man who has not been identified, exhibited "symptoms" Wednesday morning, and said the news that someone close to Trump had tested positive for coronavirus was "hitting the fan" in the West Wing.

Trump and Pence have generally refrained from wearing masks, citing the fact that they are regularly tested.

Trump told reporters his valets wear masks, and claimed “a lot of people in the White House wear masks.”

Trump, who is a self-described germophobe, has chastised aides before who coughed or sneezed in his presence. He has claimed to rarely get sick himself.