We need to build a cure for cancer
This impossible since cancer is more or less genetic also ike the common cold mutates making a cure for nearly impossible. Which is why our current options for cancer are your best bet either amputate or kemotherapy.
It's not an impossibility, with enough research they could find a cure, maybe not now but in the future. Eventually, you never know.
They would probably call me crazy if i talked about laptops in 1887, and look how far we are now.