The US and Russia have motives to keep the virus other than for research and human well being. Their methods are a smoke screen to enable the continued hold of the virus. It is thought that scientist have not being able to replicate the virus and therefore the threat of other samples does not exist, as far as we know. If this were a possibility in future years, consider the consequences and who would be the highest bidder if it were to get into the wrong hands. The risk out ways it's gain, surely. The countries should once again unite and eradicate the killer disease that took over 300 million lives in the twentieth century alone. In a matter of hours the disease can spread through the body destroying the internal systems. Britain was the first documented country to have used smallpox as a biological weapon, In 1763 we gave infected blankets and handkerchiefs from smallpox hospitals to native Americans and it worked, spreading and killing thousands of men, woman and children. These were only infected objects and the results were deadly.