A large-scale human trial of two potential Ebola vaccines got under way in Liberia's capital Monday, part of a global effort to prevent a repeat of the epidemic that has now claimed nearly 9,000 lives in West Africa.
The trials in Liberia are taking place after smaller studies determined that the vaccines were safe for human use. By comparing them now with a placebo shot, scientists hope to learn whether they can prevent people from contracting the ghastly virus that has killed some 60 percent of those hospitalized with the disease.
Yet despite the trials' promise, authorities still must combat fear and suspicion that people could become infected by taking part. Each vaccine uses a different virus to carry non-infectious Ebola genetic material into the body and spark an immune response.
On Sunday in one densely populated neighborhood of Monrovia, musicians sang songs explaining the purpose and intent of the trial in a bid to dispel fears.
His wife had expressed apprehension about the vaccine trial, but Lansana said he still wanted to take part. "From the counselling, all of the reservations I have were explained, my doubts were cleared," he said in a room where he was being observed for 30 minutes afterward.
"We are targeting about 12 persons for today and hopefully the number will increase as we go alone," Wissedi Sio Njoh, director of operation with the vaccination campaign, told The Associated Press.
Without a vaccine, officials have fought the outbreak with old-fashioned public health measures, including isolating the sick, tracking and quarantining those who had contact with them, and setting up teams to safely bury bodies.
One was developed by the National Institutes of Health and is being manufactured by GlaxoSmithKline. The other was developed by Canadian health officials and is licensed to two U.S. companies, NewLink Genetics and Merck.
The UN health agency said last week that the countries had reported fewer than 100 cases in the past week, for the first time since June.
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