Thirty-three-year-old Dr. Craig Spencer came down with a fever Thursday after returning from Guinea where he worked with the charity Doctors Without Borders, treating Ebola patients.
He is currently being treated at midtown Manhattan's Bellevue Hospital, one of the eight hospitals designated for receiving Ebola patients by US authorities.
New York Mayor Bill de Blasio says there is no reason for New Yorkers to be alarmed.
"Ebola is very difficult to contact. Being in a same subway car or being near an Ebola patient does not put someone at risk. We are working very closely with our state and federal partners to ensure that we protect the health of New Yorkers."
