Why vaccine doses differ for babies, kids, teens and adults – an immunologist explains how your immune system changes as you mature
- Written by Brian Peppers, Assistant Professor of Pediatric and Adult Allergy/Immunology, West Virginia University

Human beings are born pretty helpless, with a lot of developing to do. And just as you must learn such skills as how to walk, so must your immune system learn to defend against infections. As time passes, your immune system matures through different...