New York City Mayor Bill de Blasio during a press conference on Tuesday, March 10. NYC Media

A New York City Fire Department emergency medical technician who tested positive for coronavirus contracted the virus from his girlfriend, who is a flight attendant and had traveled to an area with an outbreak, New York City Mayor Bill de Blasio said.

As a result of the EMT’s positive test, five of his colleagues are in self-quarantine. None of them are showing symptoms, de Blasio said.

The medic treated 11 patients in the pertinent time period, de Blasio said.