You know,,,I did not ask him. I was meeting him for a first visit consult (just changed as my last doctor was not really open to alternative ways), and after going over my recent last year's history and what has been done and what I wanted in the form of additional testing,,,he just said he wanted to order a tetnus shot and do I remember when I last had one. I did not and told him I wanted to hold off until later.....So, just trying to get some feedback so I can make a decision....Thanks, D