Malaria Vaccine May Be Available In Three Years

Mr Gates is a key campaigner against the disease which kills a million people a year, most of them children.  

Since it was formed, his foundation has spent billions of dollars in the fight against malaria.

Just like smallpox, Mr Gates believes the disease can be eradicated. As yet, there is no vaccine, but, Mr Gates says, a breakthrough is near.

"We have a vaccine that's in the last trial phase - called phase three. A partially effective vaccine could even be available within three years, but a [...] fully effective vaccine will take five to 10 years," he told the BBC World Service's World Today programme.