Health authorities in Mali are monitoring 43 people known to have been in contact with a 2-year-old girl, the West African nation's first Ebola case. As Malian officials scrambled to head off the threat, authorities in neighboring Ivory Coast were hunting for a Guinean health worker believed to have fled his country, possibly carrying the disease. The 2-year-old girl, who was not identified, was brought by her grandmother to relatives in the Mali town of Kayes after the child#8217;s mother died of Ebola in Guinea. On the way, she spent 10 days in the neighborhood of Bagadadji. Ten health workers who treated the child are among the 43 being observed, according to the World Health...