200227 Virus California
A woman wearing a face mask walks through the Chinatown section of San Francisco, California, U.S., February 26, 2020. Image Credit: Reuters

The US Centers for Disease Control and Prevention on Wednesday warned of the possibility of a community spread of the coronavirus in the country after a person who reportedly did not have relevant travel history or exposure to another known patient was infected.

The infection was detected in California, bringing the total number of COVID-19 cases in the United States to 15, according to the agency.

Community spread is the spread of an illness for which the source of infection is unknown.

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