Aug. 8, 2012, 3:20 p.m.
http://www.bbc.co.uk/news/health-19126303
Malaria is one of the world's biggest killers, but now scientists in Australia say they have made a breakthrough which could lead to a malaria vaccine.
They have discovered that some people in Kenya who contract the disease and recover, develop an immunity against subsequent attacks.
The BBC's Duncan Kennedy reports from Sydney.
