The Ebola outbreak that started a year ago is the worst in human history. Thankfully late last week Liberia received the first shipments of British drug maker GlaxoSmithKline’s experimental Ebola vaccine. The first large scale Ebola vaccination is currently underway with 300 vaccines being administered. Similar vaccines are in the works from companies like Merck, and Johnson & Johnson, but have to be proven safe for humans before large-scale vaccinations can begin.