A sick passenger must be accompanied by a family member and arrive earlier to submit a medical certificate stating that they are able to travel in a pressurized aircraft.
Note: Passengers that have gone through lungs, heart or brain surgery must not board a plane before thirty days of the recovery process. In cases of flying before the thirty days of surgery recover, the passengers might only board if they have a medical certificate. There are no restrictions for epileptic passengers, except while during a seizure episode.
For more information, please contact the airline responsible for your flight.