The World Health Organization (WHO) said evidence have underestimated the Ebola death toll and that figures do not match up to the magnitude of the outbreak.

The WHO's statement could prompt West African governments to impose stronger measures to combat the outbreak. This includes stricter border control and imposing quarantines on areas with high cases.

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Last Wednesday, WHO reported 1,069 deaths, while the current estimate of those infected is now 906.

The strain on the West African nations' health sector is apparent, according to reports.

"WHO is coordinating a massive scaling up of the international response, marshalling support from individual countries, disease control agencies, agencies within the United Nations system, and others," it said in its website.

International communities consider distributing food via land transport and air. The food distribution will be beneficial to countries worse hit by the outbreak and may have trouble getting supplies.

For instance, Guinea whose death toll is now 377, has declared national health emergency Thursday, but an official said that confirmed cases are dropping in Guinea.

However, measures to be taken remain tough to contain the outbreak and prevent spread of the virus.

Health aid and supplies await clearance at the border to enter the country, while the international community has also responded to the emergency by taking precautions.

Ivory Coast, according to a statement will deny entry to ships coming from Liberia, Sierra Leone and Guinea. Guinea-Bissau had sealed its borders to prevent the virus from entering the country.

Korean Air Lines also suspended flights to and from Nairobi. It is believed to be a result of WHO's statement that classifies Kenya as risky, much to the disappointment of Kenyan officials.

Meanwhile, the U.S. administration ordered embassy workers to evacuate Sierra Leone. President Barrack Obama also talked to West African nation leaders about the outbreak.

Ebola's natural hosts are fruit bats. It is among the world's deadliest viruses, causing high mortality rate among infected individuals.

TagsEbola outbreak, Ebola toll vastly underestimated, WHO