Thank you for the response. I am a little confused by your conclusion - you have been vaccinated for smallpox but have no immunity? I think I must be misreading you because I doubt you have been vaccinated for smallpox.
My daughter was given the MMR vaccine yet still contracted a mild form of measles. I am aware that it is not a perfect solution which simply underlines how fragile the concept of herd immunity is.
RE: Now that's off my mind