MIGGY and I were recently discussing about the swine flu and I, in my usual conspiracy theory mode, ventured that for all we know, Influenza A (formerly known as swine flu) caused by the H1N1 virus, is a result of experiments by the U.S. government. After all, nuclear weapons and missiles will no longer be the weapons of choice when a country goes to war; it will most probably engage in biological warfare. The U.S. government cannot afford not to have such a capability, otherwise it will be at the mercy of warmongering countries who already have biological weapons of mass destruction.
As it turns out, the CDC had in fact, planned to do experiments on avian flu and mix it with the virus that causes human influenza back in 2004. Even the World Health Organization had begged CDC to do these experiments to prepare the world against a possible flu pandemic. So Influenza A maybe was not made by mad genius evil scientists in the U.S. for use by the U.S. military when it goes to war, but it still could be the result of actual experiments. Read this and this.