Wasnt Georgiy sent there because his disease or was before he got ill?
It was JUST before; but George had been prone to colds etc since infancy and his mother later complained that he should have been forced to wear flannel next to his skin and had not been (so she blamed his doctors for his being ill). He went on the trip just for the fun and eductaion, as Nicholas did, and showed his first symptoms at sea, with night sweats and horrible leg pains once they embarked on the leg of the journey from Egypt to India through the Red Sea. Before that he also said something in his diaries about a leg pain which he thought was from a roller-skating incident in Athens, but that may have been related to his later problems too. I think that pains in back and legs are not uncharacteristic of TB. But it was only when they got to India that he was declared unfit to continue. After that he went to Greece, Algeria and finally to the Caucasus as they tried to find cures.