A health worker brings a woman suspected of having contracted the Ebola virus to an ambulance in Monrovia, Liberia, September 15, 2014. Airlines have halted many flights into and around West Africa, where governments have closed some borders and imposed travel restrictions in a bid to fight an Ebola outbreak that has killed over 2,400 people. REUTERS/James Giahyue (LIBERIA - Tags: HEALTH DISASTER)