Head of China 's quality agency resigns over tainted baby formula ##s . WHO report claims scandal shows up again in China 's food supply chain . Associated Press contributed to this report . Four infants in China dead , 53,000 made ill from tainted milk powder .
Head of China 's quality agency resigns over tainted baby formula ##s . WHO report claims scandal shows up again in China 's food supply chain . Four infants in China dead , 53,000 made ill from tainted milk powder .