BUNIA, Congo — More than 100 people have died from Ebola less than a month after authorities declared an outbreak of the disease in eastern Congo, a grim toll as officials intensify efforts to slow the disease discovered weeks late. Attacks on health workers from angry residents, skepticism among some locals and armed conflict in hot spots continue to challenge efforts to stop the Ebola outbreak declared on May 15 , caused by a severe form of the disease. Out of the 550 cases confirmed as of