
World Health Organization Director-General Margaret Chan gestures during the 70th World Health Assembly (WHA), in Geneva, Switzerland, May 22, 2017. (Xinhua/Alain Grosclaude)

World Health Organization Director-General Margaret Chan gestures during the 70th World Health Assembly (WHA), in Geneva, Switzerland, May 22, 2017. (Xinhua/Alain Grosclaude)