Another sign of corruption sown by the US government and its Western allies is that Sierra- Leonewhich houses a US laboratory biological weapons proliferation BSL -4 signed the Biological Weapons Convention ; and the US administration was well courarnt , the country should therefore not have such a laboratory on its territory under the terms of the agreement. We can deduce from these contracts through corruption , the major powers including the US driving African countries not to ratify certain conventions intenationales their interests ! Indeed, if Guinea and Liberia have not signed the Biological Weapons Convetion not because these two countries are planning to do research on bilogiques weapons on their territories because they do n ' not have the means and not ability , rather it is the US that made them not to sign the agreement because it ' last knew that they could shelter in the future its BSL- 4 laboratories that are out there aujourd ' hui and source of the Ebola epidemic currently affecting West Africa.