Chinese health officials launched a nationwide probe last month to investigate tainted infant formula produced in China that had caused illness in thousands of infants. According to news reports, milk powder formula and other milk products from 22 of China's dairy companies had been contaminated with melamine, a chemical that can be used to disguise diluted milk by giving an inflated reading on a test for protein content of food.
Stephenson J. Tainted Infant Formula. JAMA. 2008;300(15):1752. doi:10.1001/jama.300.15.1752-b