GENEVA (AP) — The head of the U. N. health agency is hailing “encouraging signs” in the fight against an Ebola outbreak in one part of eastern Congo, while warning that case counts are rising fast in another as officials race to tamp down the virus. World Health Organization Director-General Tedros Adhanom Ghebreyesus said signs of gaining ground against the Bundibugyo virus, the rare species behind the outbreak, have emerged in Ituri province, but added that the situation is one of in a...