I want to get the Tdap booster, and I thought there are only 2 brands available: Boostrix and Adacel. However, when I called couple hospitals to check the brands and the prices, they all told me that they offered Boostaden. They told me that Boostaden is a vaccine against tetanus, diphtheria and pertussis, while Boostrix additionally protect against polio. I tried to look up Boostaden on the internet, but I can't find any information on this particular brand. Can anyone clarify my confusion? Thank you.