Malaria cases have increased dramatically in the Democratic Republic of the Congo, leaving clinics and treatment centres unable to cope, Médecins Sans Frontières (MSF) has warned. The number of people treated for malaria in MSF projects has soared by 250 per cent since 2009 in six provinces – half of the vast African country – and accelerated even more sharply in recent months. The reasons for the trend are not clear, although it is thought renewed fighting by militia groups has made it increasingly difficult for people to access prevention and treatment for the mosquito-borne disease.