“The Government Accountability Office (GAO) reported in June 2007 that “some servicemembers who received the anthrax and smallpox vaccines” experienced “severe reactions such as migraines, heart problems, and the onset of diseases including diabetes and multiple sclerosis.”’
And since there’s such a small chance that our children won’t be exposed to anthrax, imo, and the opinion of experts, it’s not worth the risk.
I think that is the sum of it. The risk outweighs the benefit.