Waning potency of pertussis vaccine a significant contributor to recent whooping cough outbreaks

A new study suggests under-vaccination is only one factor contributing to whooping cough outbreaks.

From http://feeds.sciencedaily.com/~r/sciencedaily/health_medicine/childrens_health/~3/_1YY-gEnPkA/190610090106.htm

from
https://healthnews010.wordpress.com/2019/06/11/waning-potency-of-pertussis-vaccine-a-significant-contributor-to-recent-whooping-cough-outbreaks/