Any country with the ability to manufacture basic fertilizer can create potentially devastating biological and chemical weapons. It isn't anything new. If you honestly believe the U.S. does not have such capability, you are an idiot. At the very least, the U.S. has enough knowledge and more than enough forms of the basic diseases in order to develop an effective bioweapons program in a very short time, if we thought it was necessary. I'm sure we also have plenty of weaponized forms in storage ostensibly for research purposes as well. It is difficult to develop an effective vaccine without actually having the disease, no?

At our current level of technology, bioweapons are always going to be a threat. Most countries have the ability to make them with relative ease and we can't possibly develop and effectively stockpile vaccines/cures for every weaponized form of every fatal disease.