If you were given the power to cure one disease, which would it be? Why?

If you were given the power to cure one disease, which would it be?  Why? 
The disease would be able to cure is Cancer cause Cancer kills alot of people and it hurts alot of people in America that has it and it kills alot of kids and thats the main reason cause of the kids. It sad cause over 1 million kids in the world are Diagnosed with Cancer. It sad man and honestly if i could help i would. Click Here if you want to save a Life