Over the next six months, Bill Gates and Warren Buffett will travel to to India to ask top business officials to ante up to end polio.
Gates highlighted in his annual letter the $720 million gap in the Global Polio Eradication Initiative.
The Gates Foundation will ask Indian billionaires to be part of the Giving Pledge and donate most of their fortunes to charity.
As one of the countries with the highest rate of polio transmission, India's government, alongside the Gates Foundation, is the biggest contributor to wiping out polio. In 2010, India cut cases by 95 percent, and the disease is close to being stamped out, which would make it the second disease in history to be wiped out, after small pox. Gates calls it "good progress" but says there's still more work to be done.
"If eradication fails because of a lack of generosity on the part of donor countries it would be tragic. We are so close, but we have to finish the last leg of the journey."