The World Health Organization confirmed Friday that a body in Sierra Leone had tested positive for the Ebola virus on Thursday, the day the organization announced that all known chains of transmission of Ebola in West Africa had been stopped. The victim was a 22-year-old student from the Port Loko district, said Tunis Yahya, an official with Sierra Leone’s Health Ministry. The woman died on Jan. 12 and was found to have Ebola during routine swab testing for the virus, reports NYTimes. Officials said there was no information yet on how the woman became infected. An investigation is underway. The WHO has repeatedly warned that small flare-ups of the disease are likely. The risk of transmission by survivors is expected to decrease as their immune systems clear out the virus.
