Same Filter
He was one of the subjects of the SOLDIER program, so he has been exposed to concentrated doses of Mako. It was also extracted as an energy source all around the globe, where we come from, so many other people were inadvertently exposed to it, particularly those living near the power plants.
"Jenova" was a highly advances alien that invaded our planet, with the intent of world-wide domination. When it was defeated, its body was kept in a lab to be studied, but some of its genetic material somehow "bled" into the Mako lifestream. There is no way for anyone on this planet to be exposed to both Jenova and Mako, so it isn't a threat to anyone else here, but neither is there any way that I am aware of for me to contact the one responsible for producing the cure. My friend is from an earlier point in time than I am, and still suffers, but if my blood will shed any light on the subject, I am willing to submit a sample myself.
My friend has had some bad experiences with doctors in the past, and may need some coaxing.