I will be going into herd immunity later on in the series once I cover the history f vaccines. In the past vaccines were made of horse hoof pus, cow pus and the pus of smallpox from other people. We can't imagine putting that in our body now. However, from what I've read we are putting horrible things in our body with the so called safe vaccines. I won't go into this issue now. My focus is on the base of beliefs built on to support our modern vaccine ideology.