Hervé may want to help me with this, but at the moment there is a vaccine in development, known as RTSS. However, recent clinical trials have shown that the vaccine is only partially effective and needs to be given over multiple years in order to be fully effective.
There is a role for that vaccine to play. At the moment the World Health Organization is deciding what the role is for that vaccine, but a fully effective vaccine as we know it for most other diseases is not in the immediate future for us at this point. There will be a role for vaccines, and it is important to continue the development of vaccines.
In the meantime, therefore, in fact on the question about whether we are talking about preventative drugs, indeed, we are. In the Sahel region in Africa, for example, we're finding that giving a dose of two older drugs together, three times, once a month over the rainy season, is having a huge preventative effect of between 75% and 85% for a cost of about 25¢ per month. This is not available to those who would have to take it constantly. This is in seasonal areas.
As a global community, we're beginning to think slightly differently about how to medically prevent malaria. These are the areas that we're beginning to develop, along with the use of bed nets and other interventions.
Does that answer your question?