ຈຳນວນຄົນຕາຍ ຍ້ອນອີໂບລາ ເກືອບຮອດ 900 ຄົນແລ້ວ

World Health Organization (WHO) Director-General Margaret Chan sits next to Keiji Fukuda, WHO's Assistant Director-General for health security after an emergency meeting. The WHO announced that West Africa's epidemic of Ebola is an "extraordinary event" and now constitutes an international health risk, in Geneva, Aug. 8, 2014.

This undated photo made available by the Antwerp Institute of Tropical Medicine in Antwerp, Belgium, shows the Ebola virus viewed through an electron microscope. The World Health Organization on Aug. 8, 2014 declared the Ebola outbreak in West Africa to be an international public health emergency that requires an extraordinary response to stop its spread.

An ambulance transporting Miguel Pajares, a Spanish priest who was infected with the Ebola virus while working in Liberia, leaves the Military Air Base of Torrejon de Ardoz, near Madrid, Spain, Aug. 7, 2014.

Aid workers and doctors transfer Miguel Pajares from a plane to an ambulance as he leaves the Torrejon de Ardoz military airbase, near Madrid, Spain, Aug. 7, 2014.

A Nigerian port health official uses a thermometer on a worker at the arrivals hall of Murtala Muhammed International Airport in Lagos, Nigeria, Aug. 6, 2014.

An ambulance carrying American missionary Nancy Writebol, 59, who is infected with Ebola in West Africa arrives past crowds of people taking pictures at Emory University Hospital in Atlanta, Georgia, Aug. 5, 2014.

Nigeria health officials wait to screen passengers at the arrival hall of Murtala Muhammed International Airport in Lagos, Nigeria, Aug. 4, 2014. 

Nigeria health officials display a leaflet explaining the Ebola virus, at the arrival hall of Murtala Muhammed International Airport, in Lagos, Nigeria, Aug. 4, 2014. 

Dr. Kent Brantly and his wife, Amber, are seen in an undated photo provided by Samaritan's Purse. Brantly became the first person infected with Ebola to be brought to the United States from Africa, arriving at Emory University Hospital, in Atlanta, Aug. 2, 2014. 

People queue outside a bank as fear spreads that public buildings might be closed due to the spread of the deadly Ebola virus, Monrovia, Liberia, Aug. 4, 2014.