A pill to reduce the risk of HIV infection in members of at risk groups sounds good, but I would put money on HIV infection rates increasing, rather than decreasing, where this drug is made available. Labor and the Greens will press for its early introduction.

But a genetically modified bacterium designed to destroy malarial parasites before they can infect anyone bitten by a parasite-carrying mosquito could save hundreds of thousands of lives every year. Wait for the Greens to start protesting about the use of GM organisms.