Coronavirus case confirmed in Southern California

Human coronavirus causes respiratory infections and gastroenteritis. Image produced using high-dynamic-range imaging (HDRI) from an image taken with transmission electron microscopy. Viral diameter around 80-160 nm. ( Photo by: BSIP/Universal Images Group via Getty Images )

The first confirmed case of the novel coronavirus has been found among hundreds of people who were evacuated from China to military bases in the United States.

UC San Diego Health says a person who landed at Marine Air Base Miramar in San Diego last week had been hospitalized with symptoms but sent back to the base after testing negative.

On Monday, however, the person returned to hospital isolation after federal officials said the person failed further testing. It's the first confirmed case among evacuees quarantined at U.S. bases. Overall, there have been 13 confirmed cases in the U.S., including seven in California.