内容摘要："A little bit of your money goes a really long way in South Africa," he added.

"A little bit of your money goes a really long way in South Africa," he added.

The 38-year-old, who works as a train driver, says he had his work and life upended by the cholesterol granuloma between his brain and eye socket, and still deals with the aftermath two years later."When I first had symptoms I wasn't overly sort of bothered by them," Mr Lewis said.

He had started to experience double vision in 2023 and saw an optician, who assured him it was normal for someone his age.But after feeling that something was not right in his body, he sought out an MRI scan which revealed the tumour."I remember the room turning into like this tunnel, and Shayne was sat to my left, and I completely shut down.

"He was asking all the right questions, but I remember at that point, I sort of went into this self-preservation mode, and because of the nature of it no-one truly knew how to operate."After visiting hospitals in Nottingham, Sheffield, and Lincoln, a surgeon in Leicester figured out how to proceed with the removal, Mr Lewis said.

He was told the tumour might be cancerous, and there was no way of knowing until it would have been taken out.

Mr Lewis said that was when doctors told him to consider writing his will.Gates said his foundation, which has a long history of operating in Africa, would focus on improving primary healthcare.

"What we've learned is that helping the mother be healthy and have great nutrition before she gets pregnant, while she is pregnant, delivers the strongest results," he said."Ensuring the child receives good nutrition in their first four years as well makes all the difference."

In a message to young innovators, the tech billionaire noted that mobile phones had revolutionised banking in Africa, and argued that AI should now be used for the continent's benefit."Africa largely skipped traditional banking and now you have a chance, as you build your next generation healthcare systems, to think about how AI is built into that," he said.