When I was a child I was depressed, and my father would tell me that "There's a silver lining to every storm cloud. You just need to find it."
The world needs to realise that there is no silver lining to the storm cloud of depression or the thunder of disease.
It's not hidden. It's not waiting around the corner, ready to jump out. It's not going to suddenly change fate, a miracle cure. It's not been found because it is not there.