[Black Agnes]

Psst, it’s not just pertussis either:

http://www.ncbi.nlm.nih.gov/pubmed/25692622

“A new vaccine escape mutant of hepatitis B virus causes occult infection.”

Bugs winning.

[AdmSmith]

It is natural that there is a genetic drift within the pathogen population, thus we will see occult infections.

This is nothing new, I found this paper from 1978, http://www.ncbi.nlm.nih.gov/pubmed/96534 but that is not the oldest.

I'm not worried about this.

[daisy12]

I remember back in the 80s when Hep B was only given to the newborns of prostitutes and IV drug users. It was considered a very big deal.

In the 90s two co-workers got the Hep B shots. I don’t think they finished the series as one became quite ill. Both developed symptoms of MS within a year.