Ebola still has the ''upper hand'' in the outbreak that has killed more than 1,400 people in West Africa, but experts have the means to stop it, a top American health official said during a visit to the hardest-hit countries.
Dr. Tom Frieden, director of the US Centers for Disease Control and Prevention, was in Liberia on Tuesday and later planned to stop in Sierra Leone and Guinea. Nigeria also has cases, but officials there have expressed optimism the virus can be controlled.
''Lots of hard work is happening. Lots of good things are happening,'' Frieden said at a meeting attended by Liberian President Ellen Johnson Sirleaf on Monday.
''But the virus still has the upper hand,'' he added.
Even as Liberia has resorted to stringent measures to try to halt Ebola's spread, frustration mounted over the slow collection of bodies from neighborhoods of Monrovia. A group of residents attached plastic ties to the wrists and ankles of one suspected Ebola victim and dragged his corpse to a busy street.
Authorities have decreed that all the dead must be collected by government health workers and cremated because contact with bodies can transmit the virus.
There is no proven treatment for Ebola, so health workers primarily focus on isolating the sick. But a small number of patients in this outbreak have received an experimental drug called ZMapp. The London hospital treating a British nurse infected in Sierra Leone, William Pooley, said he is now receiving the drug.
The California-based maker of ZMapp has said its supplies are exhausted.
Two Americans, a Spaniard and three health workers in Liberia have received ZMapp. It is unclear if the drug is effective.
In Nigeria, two more Ebola patients were declared to have recovered and were released from hospital, Health Minister Onyebuchi Chukwu said Tuesday. Five people have died of the disease in Nigeria, while a total of seven have recovered.
Meanwhile, the World Health Organization announced that it is pulling out its team from the eastern Sierra Leonean city of Kailahun, where an epidemiologist working with the organization was recently infected. Daniel Kertesz, the organization's representative in the country, said that the team was exhausted and that the added stress of a colleague getting sick could increase the risk of mistakes.
Also, Canadian health officials late Tuesday said in a statement that they would evacuate a three-member mobile laboratory team in Sierra Leone after