California tells 7K people to stay home because of new virus

The department said that number excludes those who visited China's Hubei province, where the disease known as COVID-19 originated. Americans who spent time there and in Hubei's provincial capital of Wuhan have been flown home on U.S.-chartered flights and quarantined on military bases.

The U.S. is funneling travelers from China to 11 airports, including San Francisco International Airport, to ensure they get medical screening and medical care. At least 34 people in the U.S. have tested positive for the virus, including 18 who returned home from a quarantined cruise ship in Japan, the Centers for Disease Control said during a conference call with reporters Friday.

Federal authorities at the San Francisco airport are informing the travelers who return from China that they should isolate themselves at home.

The CDC said it is not tracking how many people from each U.S. state who have returned from China have been asked to isolate themselves.

Federal officials share passenger details with states, who pass that information on to local health agencies. All those returning are advised to follow CDC recommendations to prevent possible transmission, the state agency said.

There are 10 people in California who have tested positive for the virus in lab tests performed by the CDC, the California Department of Public Health said.

California's Humboldt and Sacramento counties reported their first cases of the virus Friday, both from people who had recently traveled to China.