Dr Sumi Biswas talks about the development of a vaccine aimed at the mosquito stage of the malaria parasite cycle. Malaria transmission-blocking vaccines aim to induce immunity against the parasites that infect mosquitoes. Such vaccines will prevent malaria transmission on a wider scale, focusing on the community rather than the individual. Dr Sumi Biswas is working on the development of transmission-blocking vaccines to prevent the spread of malaria.