The Standard & Poor's 500 index erased its 2020 advance as traders remained on edge over the impact of the deadly disease.
The mandatory order, from the Centers for Disease Control and Prevention (CDC), was the first of its kind in around 60 years.
"We are seeing in the cases that are in the hospital, we've seen people who had detectable virus, and they didn't have the technical virus, and then three days later they had detectable virus", said Robert Redfield, the CDC's director.
More than 100 cases have been reported outside China, in 22 countries.
Indonesian officials said around 250 nationals being evacuated from Hubei will be quarantined on a military base on the remote Natuna Islands.
The man has since self-isolated at his home, leaving home twice to seek medical care.
In order to reduce the likelihood of transmission, the World Health Organization recommends that people frequently wash their hands, cover their mouth and nose when sneezing or coughing, and avoid close contact with those who are sick.
Speaking at a news conference in Geneva, Dr. Tedros described the virus as an "unprecedented outbreak" that has been met with an "unprecedented response".
"We must all act together now to limit further spread".
The current outbreak is a new virus that causes respiratory illness in people and can spread from person-to-person. According to federal data released Friday, influenza has killed approximately 10,000 Americans since October. All this has happened, and the virus still doesn't have an official name.
AFP understands that both had travelled to China recently.
At the same time all commercial flights from China would be restricted to worldwide USA airports in one of seven cities - New York, Chicago, Atlanta, Los Angeles, San Francisco, Seattle and Honolulu.
The seven airports are in New York, San Francisco, Seattle, Honolulu, Los Angeles, Chicago and Atlanta.
The travel industry has expressed concern about a growing financial hit from coronavirus fears.
Just as the World Health Organization recommended against travel restrictions, the United States rushed to go in the opposite way, Hua said, adding this was certainly not a gesture of goodwill.
Qantas Airways Ltd and Air New Zealand said global travel bans had forced them to suspend their direct flights to China from February 9.
The Department of Health (DOH) said it will recommend a wider travel ban to include other provinces in China when the situation requires it.
Many nations have put on special charter flights to repatriate citizens from China.
Anxiety has escalated with more evidence that people may transmit the disease without obvious telltale signs of infection, such as coughing, sneezing and a fever.
Boston University postponed its study overseas program to Shanghai scheduled to depart in February.
Walmart Inc, the world's largest retailer, announced it was temporarily limiting "non-business critical travel" to China, while farm equipment maker Deere & Co temporarily closed its facilities in China, the latest of dozens of major companies restricting travel and operations due to the outbreak.
Sri Lanka became the latest country to report a case when a Chinese woman travelling there was found to have coronavirus.
A second Xiamen flight landed soon afterwards carrying Hubei residents from Kota Kinabalu, a popular coastal tourist destination in Malaysia.