In this April 7, 2010 photograph, staff prepare oral rehydration salts, or ORS, at the International Center for Diarrheal Disease Research, hospital in Dhaka, Bangladesh. A pinch of salt. A fistful of sugar. A half liter of water. Over the past 30 years, this simple ‘poor man’s Gatorade’ has become a cheap, trusted home remedy passed down to generations of Bangladeshi moms nationwide. (AP Photo/Pavel Rahman)