Well, DNA is the genetic material that determines everything. RNA, however, is what actually executes what instructions the DNA tells it to do. If the DNA tells them to create AIDS, they'll make AIDS. If the DNA tells them to create something that would fight cancer, they'll fight AIDS.

Some diseases are formed by "glitches" in the RNA, so sometimes it's hard to know who will get a disease & when. We can predict who is more likely, but sometimes things sneak up on us.

As far as cures go, it's slow going. For some diseases such as AIDS, it affects the DNA directly & becomes part of the

Question

Well, DNA is the genetic material that determines everything. RNA, however, is what actually executes what instructions the DNA tells it to do. If the DNA tells them to create AIDS, they'll make AIDS. If the DNA tells them to create something that would fight cancer, they'll fight AIDS.
 
Some diseases are formed by "glitches" in the RNA, so sometimes it's hard to know who will get a disease & when. We can predict who is more likely, but sometimes things sneak up on us. 

As far as cures go, it's slow going. For some diseases such as AIDS, it affects the DNA directly & becomes part of the