Two researchers at Berkeley have
created a virus which fights AIDS. This virus is a modified version of HIV with the harmful parts replaced by a mechanism that inhibits HIV's ability to kill immune cells. The anti-AIDS virus is sexually transmissible, much as HIV is, which means that now it is hypothetically possible to screw a sick person healthy. (They may have to get rid of this if they ever market it, as not to lose revenue; otherwise they could sell multi-user site-licenses to sexually promiscuous patients, or put a celibacy clause in their licenses and prosecute violators under copyright laws.)