Often people will tell me that they feel worse and I ask them to look back to the last thing they did or ate. Every once in a while I get someone who said, well, last week I got the flu shot or another kind of vaccine.
 
I won't go into all of my feelings on this topic, I realize it is heated, but, vaccines can very much effect your treatment. During treatment for IC, it is best to not get vaccinated, as it can negatively alter the work we are doing with your immune system.

This is a nicely laid out article by Dr. Mercola on the subject of flu vaccine.http://articles.mercola.com/sites/articles/archive/2010/11/01/flu-vaccin...