It's clear that prevention will never be sufficient. That's why we need a vaccine that will be safe.

We don't know why, but there are some gradients of infection.

Since most of the transmission is sexual transmission, you have a regional or local response to the virus.

I've participated in meetings where there were concerns by ethical experts. There is no clear solution.

It's easier to learn things for life by the age of 12 and not the age of 18. This is just my guess.

Another interesting field, which is my own, is cofactors, not only to the disease but also to transmission. I am still puzzled by the fact that you get more sexual transmission in some ethnic populations. One way to answer this is to look for genetic factors.

AIDS win be our first priority, but in two years' time we don't know where AIDS research will stand, so we are also thinking of activity on other diseases.