That "faith" is not the same as your faith... One is based on empirical evidence. I suppose I could use the word faith in saying that I have "faith" that if I have an equal mixture solution of liquid benzene and toluene, there will be a larger proportion benzene in the gas above the solution than toluene, and I could have enough "faith" that I could give you approximate percentages of that proportion. I could also say I have faith that I will be reincarnated as a dog upon my death. While faith could probably be used as a word in both cases, their meanings are not synonymous.
I am optimistic that scientists will find a cure for cancer, because despite that curing cancer is very difficult given the nature of cancer, scientists have so far proven themselves to be up to the task of curing a plethora of diseases that were once thought to be equally dangerous. It will not be by some miraculous process, but by the ingenuity, dedication, and hard work of researchers, scientists, and physicians around the world.
I do believe that the beneficial effects of religion are social, and not because of an actual hand played by God. I suppose a study must be done between Islam, Christianity, and Judaism to see if it's a specific brand of belief that is most beneficial, or simply the act of believing that is beneficial.