During the pandemic in the US , the CDC confirmed , on February 26 , 2020 , that an individual without know exposure through travel or close contact with someone else infected , had coronavirus in northern California .
On February 26 , a person with `` no known exposure to the virus through travel or close contact with a known infected individual '' was confirmed by the Centers for Disease Control and Prevention ( CDC ) in northern California .
2020 coronavirus pandemic in the United States