Donald Trump Jr., 42, the eldest son of President Trump, was positive this week for nCoV but had no symptoms.

"Don had a positive result earlier in the week and has been quarantined since then, a spokesman for Donald Trump Jr. said in Washington on Nov. 20." He has absolutely no symptoms and is following it all.

Previously, first lady Melania Trump, youngest son Barron, chief of staff Mark Meadows and several other top aides of President Trump were positive for nCoV.

The United States is the world's largest epidemic zone with more than 12.2 million infected people and more than 260,000 deaths.