As I already once have mentioned, a great challenge for the development aid efforts is to create incentives for the pharmaceutical corporations to research on medicines that are really needed. Unfortunately, most of the pharmaceutical products developed are cosmetics. According to the WHO, only less than 1% of what is being developed are medicines against tropical diseases. But there are millions of people in the developing world dying and suffering from AIDS, tuberculosis, malaria etc. Either there are no new, potent medicines against these diseases, or, if there are (as in the case of AIDS), they are too costly due to patent rights.