(CNN) A new case of the novel coronavirus has been confirmed among US evacuees at a San Diego County, California air base, the Centers for Disease Control and Prevention said Wednesday.

The patient is among a group that was under a federal quarantine order after returning on a State Department-chartered flight that arrived at Marine Corps Air Station Miramar on February 7, the CDC said.

This is the second evacuee from Wuhan, China, under quarantine at the base to test positive for novel coronavirus. The first patient arrived at the base on February 5. She was the first US evacuee from China to be known to be infected with the novel coronavirus.

"The first and second patients arrived on different planes and were housed in separate facilities; there are no epidemiologic links between them," the CDC said in a news release.

The two patients are being cared for at UC San Diego Health, hospital officials said.

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