This is an excellent video about immunity, vaccines and how overboard we sometimes go in trying to create a sterile environment. Sometimes having too sterile of an environment is not the most healthy thing for us. Of course living in dirty conditions, is not health easier. There needs to be balance.
Before people run to the doctor and get flu shots and other vaccines, they really need to research and understand what is happening. Take a look at this blog post on the topic H1N1 Vaccine Linked To Increase In Miscarriages. We as humans need to engage more in our own understanding of what we do to our bodies. I am not going to tell you to take vaccines or not to take them because that is something you have to decide for yourself. Be informed though and just don't follow the medical establishment blindly.