HEREWARD HOLLAND A new measles outbreak has flared up in the Democratic Republic of Congo just eight months after authorities declared an end to the worst known outbreak in the country's history, medical charity Médecins Sans Frontières (MSF) said. More than 13,000 cases of measles have been recorded in the country since Jan 1., the medical charity said, despite vaccination campaigns that have targeted millions of children across the country's remote jungle areas in the last two years. The vaccine drive greatly reduced the number of patients, but failed to cut the chain of transmission, MSF said in a statement…