When I was a child, there were not that many vaccines. I was vaccinated for polio. I actually got measles as a child. I got pertussis, whooping cough. I remember that very well.

Today we know the best way to prevent the spread of Ebola infection is through public health measures.

The launch of phase 1 Ebola vaccine studies is a first step in developing a vaccine that could be licensed and used in the field to protect not only the front line health care workers but also those living in areas where Ebola virus exists.

I believe I have a personal responsibility to make a positive impact on society.

When you put someone on therapy, you lower the level of virus such that it makes it very difficult for them to infect others.

The nature of a protective immune response to HIV is still unclear. Because in a very, very unique manner, unlike virtually any other microbe with which we're familiar, the HIV virus has evolved in a way that the immune system finds it very difficult, if not impossible, to deal with the virus.

We feel confident that there won't be an outbreak.