GENEVA, Switzerland (AFP)—The World Health Organization (WHO) said Tuesday it was examining whether any candidate vaccines or treatments could be used to rein in what it warned could be a lengthy Ebola outbreak in the Democratic Republic of Congo. The WHO has declared the surge of the highly contagious haemorrhagic fever, suspected to have killed 131 people and infected more than 500, an international health emergency. "At the international level, (we are) looking at what candidate vaccines or treatment are available and if any could be of use in this outbreak," Anne Ancia, the WHO's DRC representative, told reporters in Geneva, speaking from Bunia in the Ituri region.