Lots of misinformation. Poison ivy is an allergy not a disease. Allergy is a non-productive over-reaction of the immune system, not the lack of sufficient immunity to overcome an invading virus. Thiomersal is a safe preservative used in vaccines, but due to political pressure is no longer used in developed countries like the US, but is still used in developing countries where immunizations must be stored for long periods of time under adverse conditions. Like I said above, it is easy to pick and choose evidence to support a belief, but science is all about considering all the credible evidence. Next time I need a surgery, I will sure not take a vote among the public on which one I need. It is all about who you trust, the scientists, or posters on the web. The personal stories about getting or not getting the flu are kind of like asking folks if the earth looks round or flat when they look out there window.