Doctors in Liberia were out on strike on Tuesday as they struggled to cope with the outbreak of the deadly Ebola virus, while the United Nations warned the spread of the disease in West Africa was causing food shortages in one of the world's poorest regions. Medical charity Medecins Sans Frontieres (MSF) said 800 more beds for Ebola patients were urgently needed in the Liberian capital Monrovia alone, while in Sierra Leone highly infectious bodies were rotting in the streets. MSF called for rich nations to send military medical teams to support buckling healthcare systems in West Africa.