I had chicken pox when I was 29 years old. I was very sick for two weeks with a high fever. 5 years later I was diagnosed with pernicious anemia. Pernicious anemia can take 5 years to show symptoms as it can take that long for the body to use up it's store of vitamin b12. I was wondering if there can be a link between chicken pox and the loss of a person's ability to produce intrinsic factor-the main cause of pernicious anemia?