The John Titor story is a hoax. On the johntitor website predictions for 2000 he states on answers 49- 51:
What is the health care like in 2036?
(49) I would compare it to what you see in Western movies. We do have hospitals but there are more family doctors and house calls as compared to what
you are used to.
(50) There is no real organized health care. If you get a serious disease, you die.
then he goes on to say:
medical advances in 2036 have anything to do with genetics?
(60)I believe there is a great deal of progress in treating the cancer cells with modified viruses. So I guess the answer is yes.
Can ya say contradiction?