Vaccine Education Center
The Vaccine Education Center at Children's Hospital of Philadelphia provides complete, up-to-date and reliable information about vaccines to parents and healthcare professionals. We are a member of the World Health Organization's (WHO) Vaccine Safety Net because our website meets the criteria for credibility and content as defined by the Global Advisory Committee on Vaccine Safety. Learn more about the WHO’s Vaccine Safety Net.
Feature Article — Science Made Easy: Viral Transmission, Human Immunity & the Gap Called “Immunity Debt”
In this video feature article, Dr. Offit discusses the concept of “immunity debt” (also called “immunity gap”). Find out more.