@lynneblundell
@Dog
Yes, young-earth creationists do deny the implications of medical science, along with biology, geology and physics. As an example from each field:
Medical science- If evolution is false, and humans are a special creation, there is absolutely no logical reason that studying rats should teach us about people, or that monkeys would be more like us than rats, and chimps more like us than monkeys. Yet (ethical issues aside) animal research does teach us about people.
Biology- Every piece of evidence we have available to us points to common descent. Yet creationists deny it happened,
Geology- There is absolutely zero evidence that the Earth is 6000 years old. Yet creationists still maintain that it is.
Physics- Creationists deny the Big Bang theory, which is supported by modern astrophysics.