ROCHESTER, N.Y. — For the second time in less than a week, Monroe County health officials are warning travelers of possible exposure to the coronavirus.

Last time, it was a bus. This time, it's a jet.

A passenger on Delta Flight 4824 from JFK International Airport to Rochester late Saturday afternoon was ill with COVID-19 and likely was spreading the virus during the flight, the county said in a news release late Wednesday night.

Fellow passengers, along with people who were in the terminal when the flight landed at 5:55 p.m. Saturday were advised to "monitor for symptoms of fever, cough and shortness of breath," the news release said.

Updated:Number of COVID-19 cases in Monroe County

Anyone with those symptoms should call their health-care provider immediately. Those with no provider may call a county coronavirus hotline at (585) 753-5555.

The county said it only learned Wednesday evening that the passenger was positive for coronavirus. The unidentified traveler "has been under isolation since arrival, and close household contacts have been under self-quarantine," the news release said.

Greater Rochester International Airport would have been relatively busy around 6 p.m. Saturday, At least nine flights arrived right before the flight carrying the traveler with COVID-19 or departed shortly after the plane landed here, according to online schedules for this coming Saturday.

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The same Canadair Regional Jet CRJ-200 then returned to JFK International just before 7 p.m. the same night.

Delta Flight 4824 is code shared with other international carriers including Air France, Alitalia, Korean Air and KLM. There is no additional information on the inbound route the passenger took into JFK.

On Wednesday, March 11, county health officials announced a local man had tested positive for the infectious virus. Two days later, they acknowledged he had traveled here on a Greyhound bus from New York City to Rochester, potentially exposing other passengers.

That man, who also was confined at home after arriving here, acquired the virus while visiting Italy, officials said.

Updated:Number of coronavirus cases in Monroe County

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At last word, the health department had found seven bus passengers who disembarked with the man in Rochester, but were looking for four more whose identities they did not know.

They have not said whether those passengers were located.

Elizabeth Wolf with Delta Corporate Communications responded to a request for comment regarding the flight from JFK to Rochester. "With regard to reports of any COVID-19 exposure, we continue to follow all guidelines from the CDC and local health officials. The safety and health of our customers and crew remain our top priority."

Contact watchdog reporter Steve Orr at sorr@democratandchronicle.com or at (585) 258-2386. Follow him on Twitter at @SOrr1. This coverage is only possible with support from our readers. If you don't already have a digital subscription, please sign up today.