I am a man, and a citizen of the world. I am neither a vaccine nor a small-pox, nor a…

I am a vaccine-lymph, and I am very small, but I am very important. I am a very small dose of a very attenuated and very attenuated vaccine, and I am used to prevent people from…

I am a spirit that has left the body, And hover o'er the earth, Where the scenes of my former life are passed in review.