10 days ago my husband was kayaking and the kayak hit his head, there was a slight cut to it also. 4 days later he had a 21kilo suitcase fall on his head from an over head locker. he went to the hospital because he was not feeling quite right, they ruled everything out and gave him a clean bill of health. 3 days later he nearly collapsed at the airport, was seen by a first aider, but still got on plane.!! 6hrs later he breaks into a fever starts shaking, pains all over his body and with shortness of breath, and very disorientated. It all cleared within maybe 12hrs. Doc was called and they said bad flu.!!! ( in Italy) He is due to fly again in a couple of days. !! Any ideas.