KIGALI, Rwanda  Health authorities in northwest Democratic Republic of Congo are observing a relief among patients after treating symptoms of a mysterious disease that has killed dozens of individuals and sickened many others since its outbreak this year in the Equateur province, an official said on Friday. Melanie Elambo, Congo’s provincial minister in charge of health in Equateur, said the World Health Organization (WHO) has provided medicine support to the government. “As investigations to