A passenger who flew on a JetBlue flight from New York to West Palm Beach, Fla., on Wednesday night learned midair that he had tested positive for the coronavirus, officials said, raising questions about possible widespread exposure.

The passenger, who had previously been tested for the virus and was awaiting results, got a notification toward the end of the flight that the test had come back positive. The person was overheard talking about it, and the flight crew quickly notified health officials on the ground, JetBlue confirmed on Thursday.

“JetBlue had no prior indication that this customer had or may have had coronavirus,” the airline said in a statement.