The Soviets literally developed tons of lethal bio-war agents included 'chimeras' at the various branches of Bioreparat, the official Soviet bio-warfare agency, including smallpox, anthrax, botulism and many others including Ebola and similar strains.
Smallpox virus is kept on hand today by America and the Soviet Union, and undoubtedly by Great Britain and a couple of others as well, particularly in the Middle East.
Bio-warfare agents are the Third World's nuclear weapons.
The danger from smallpox today is that no one is immune to it any longer. Nations stopped innoculating for smallpox many years ago, and for those of us old enough to have been automatically innoculated, the immunity wore off between ten and twenty years afterwards.
There are today approximately 500,000 doses of smallpox vaccine on hand worldwide, enough for around one out of every 100,000 people. Thanks to our badly eroded immune systems and lack of any vaccination program, an epidemic would smash through the population far worse than the onslaught of the Black Death or the Spanish Flu.
Quis Custodiet Ipsos Custodes? Who is watching the watchers?