According to immunize.org, vaccines have saved more than a billion lives in the past 50 years. Meanwhile, kids in Seattle have lower vaccination rates than kids in some developing countries.

The above map shows the percentages of kids with all required vaccinations* in Seattle public elementary schools with outlines delineating elementary school attendance areas for the 2015-2016 school year. For point of reference, studies say immunization rates need to from above 80% to above 95% for herd immunity to prevent the spread of certain diseases. Parents, please vaccinate your kids!

Data:
School immunization rates
Elementary school attendance areas

*Required vaccines include: hepatitis-B , DTaP (diphtheria, tetanus, and pertussis/whooping cough), IPV (polio), MMR (measles, mumps, and rubella), and varicella (chicken pox).