I am a very small dose of vaccine, and I am so small that I am not even named. I am s…

I am a sin, which was born in the same hour with myself, and has ever since been my constant companion. I am a sin of no common mould, being the opposite extreme to folly, and…

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…