The man behind Watsi, a website raising money to save lives
A pioneering way for individuals to donate money to one-off medical treatments in the developing world has caught the attention of Silicon Valley investors.
Watsi is a new take on the idea of crowdfunding, which involves large numbers of people contributing to a project to help it achieve a specific goal.
The non-profit website allows visitors to make personal donations for as little as $5 (£3.20) to fund the treatment of their patient of choice but some have questioned whether it could be become a popularity contest.
The BBC's North America Technology correspondent Richard Taylor reports.
A version of this report will also appear on BBC Click on Saturday 17 August.
- From the section Technology