hello i was wondering how airlines regulate passangers that are to ill to fly maybe have a fever.....do they look out for people that might try not to loose there money on a 11 hour flight by going transit when sick......my wife knows somone who had to go on her flight and sick......i personally had a fever and flew from cdg to ham one time it was vary uncomfotable and ear hurt from pressure vary much......would someone get a note from doctor or just buy travel insurance suppose