I'm dying!!

I may as well be straight with it. I'm dying.
I have a disease that was passed down to me from my fathers. It's a hereditary disease that I contracted from birth and although it's been treated many times it is still there. I've had remissions on and off but it always comes back. It's a horrible condition and it's affected my whole family and others. The fatality rate of this disease is 100%. A lot of people who have this disease don't even know they have it until it's too late.
The manifestation of this disease varies with each person that has it. Depending on it's manifestation, it can be contagious. But I find that with others who have this disease it really acts up.
I've hidden this disease for a long time. A lot of people do. I think it's because they just don't want to admit that they have it. I know that's the case for me. I've tried to live my life like I don't have it but that usually only makes this disease worse. Or atleast it seems like it does.
People who have this disease deal different ways. Some people don't realize it. Some people pretend like they don't have it. Some people don't care that they have it and seem to embrace it. And some people, knowing they have it get treatment.
The treatment is pretty interesting. There is only one way to cure it. Atleast that's what my physician says. He's a Great Physician bye the way. He gave up his life to get it.
It's sort of like a blood transfusion. Part of the treatment is to acknowledge it. You also can't let it rule you. In fact you have sort of take off the disease as if it were something old and put on something new. A weird practice, and not an easy thing to do by any means. I have a hard time with that because sometimes it's just easier to not fight the disease. It's easier to let it take over. But than again I realize that fighting is worth it, especially in the end. I haven't completely beat the disease but I've gotten to a point where I don't always let it rule my life. Now I want to spend my life telling people about the disease helping those who have it realize it and fight it.
Though people don't know it, the disease is actually pretty common. Life expectancy for this disease has gone down drastically but there really is no average. Some people die before birth and some people live a long time.
I'm sure you've heard of it before.
The name of it: Sin.