- Number of children contracting preventable diseases down 99 % since the early 1970s- 13 vaccine-preventable diseases: diphtheria, haemophilius influenzae type B, hepatitis A & B, measles, mumps, pertussis, pneumococcal pneumonia & meningitis, polio, rotavirus, rubella, tetanus & varicella or chickenpox- In 2004, 83% of US children aged 19-35 months were up to date on their shots compared to just 76% in 1996- Individuals & communities helped reach current childhood immunization coverage levels