A man and woman tested negative for the Ebola virus Monday after they went to Bellevue Hospital.

Both the man and woman were later released. It was not clear why they had gone there or what symptoms, if any, they had exhibited.

"It was quickly determined they did not have the virus," said Ian Michaels, the city's Health and Hospitals Corporation spokesman. "Because of the heightened alert, hospitals will be using enhanced scrutiny and an abundance of caution when reviewing questionable cases, and are meticulously following all public health and CDC protocols."

This weekend at Kennedy Airport, passengers from Guinea, Liberia and Sierra Leone were being screened for Ebola.

According to U.S. Customs and Border Protection officials, Kennedy Airport is a major entry point from West Africa, receiving at least half of the approximately 150 people coming from that region who enter the United States daily.

Customs and airport officials are using infrared no-touch thermometers to take the temperatures of travelers coming from the three West African nations that have experienced severe Ebola outbreaks.

Michaels would not say if the couple examined at Bellevue Monday recently traveled from West Africa.