Good work is being done on microbicides, which are very simple compounds, far too simple for the pharmaceutical companies to take them up. Some of them appear to be made from seaweed, which I am sure would have enormously impressed our grandmothers who told us about the value of carrageen moss. This country has put money towards research into microbicides which, if used vaginally, appear to block the transmission of the HIV virus. Another area we need to address is the very high level of sexually transmitted diseases like syphilis and gonorrhoea.