[size=x-small]I honestly agree with what malmon said (I believe it was malmon anyway) about no sickness. [/size]
[size=x-small]But if we have to be specific, I'd say remove every STD that has/does/will ever exist, including AIDS. So many people are given some sort of disease this way without any choice in the matter due to a partner being unwilling to disclose such information, and it makes me sad every time I hear of stories like this.[/size]