Agence France-Presse: Insufficient food, climate change and pandemic flu are global crises which could unravel progress in public health, the World Health Organization’s director general said. “These three critical events, these clear threats to international security, have the potential to undo much hard-won progress in public health,” WHO director general Margaret Chan told delegates from 193 member states at the WHO’s annual general assembly. Two of the three are beyond the control of the …