Where might you look on the internet on the good scientific information about an illness?

A regular internet search (like google or Yahoo) will give you links to a good deal of information about an illness. It may also point you to a good deal of misinformation about the illness. You need to use your judgement to determine the good from the bad information and you most likely actually need to talk to a medical professional.

For the good scientific information you may also be able to access and browse on line versions of actual research journals from the medical and scientific associations (like JAMA, NEJM) though they are often not free.