thanks Frances, I read part of the site and bookmarked it for further reading. It was very interesting and said;

. Later the medical staff was re-organized, and only resident medical officers were employed . The efficiency of the medical service at Knockaloe Camp may be judged from the fact that the mortality rate in no year exceeded three per mille, an extremely low rate when compared with that of the ordinary population of the Island, which, for the same period, exceeded fifteen per mille. It was regrettable that during the Camp’s existence two local practitioners, Dr. H. C. Sugden, of Ramsey, and Dr. J. E. Godson, of Laxey, died whilst in the service of the Government at Knockaloe. Both these doctors were much respected by both the staff and the prisoners in the Camp, and were highly esteemed throughout the Island. Dr. R. T. McGeagh, the resident medical officer in charge of Camp 4, at Knockaloe, held his appointment for nearly three years. He had medical control of the largest Camp in the Island , the number of prisoners interned in it amounting at one time to 7,000.

that doesn't sound too bad!