MONROVIA, LIBERIA - FEBRUARY 02: Dr. Mike Montello, research director at the U.S. National Institutes of Health, prepares the first batch of Ebola vaccines to be given in the Ebola vaccine trials, which were launched at Redemption Hospital, formerly an Ebola holding center, on February 2, 2015 in Monrovia, Liberia. Twelve people were given injections on the first day, out of a planned 27,000 people in the Monrovia area. The clinical research study is being conducted jointly by the U.S. National Institutes of Health (NIH), and the Liberian Ministry of Health. The Ebola epidemic virus has killed at least 3,700 people in Liberia alone, the most of any country, and nearly 9,000 across in West Africa. (Photo by John Moore/Getty Images)
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