Evidence review of claims about the childhood vaccination schedule overwhelming the immune system.
"The childhood vaccination schedule gives too many vaccines too soon, overwhelming the developing immune system and causing autism, immune dysfunction, and other chronic conditions."
1. Immune system capacity: Infants can respond to thousands of antigens simultaneously. The current schedule exposes the immune system to far fewer antigens than the environment does naturally.
2. Historical comparison: The old smallpox vaccine alone exposed children to more antigens than the entire modern schedule. Autism rates continued to rise even as vaccine antigens decreased (due to removal of whole-cell pertussis).
3. Independent studies: Multiple independent reviews (IOM, Harvard, Stanford) have found no credible evidence that the schedule causes harm.
Confidence Level: HIGH