The World Health Organization has launched a new initiative it believes will allow greater access to life-saving insulin at lower prices for a greater number of people suffering from diabetes. More than 420 million people globally suffer from diabetes and are in need of insulin to stay alive. Diabetes, a disease that once mainly affected rich countries, is now most prevalent in low-and-middle-income countries. The prequalification program is a tool for assessing the quality, safety and efficacy of a medicine. Emer Cooke, director of regulation of medicines and other health technologies at the WHO, says anyone who buys a WHO prequalified medication can be sure that the product is safe and effective.