title: Changes in age specific immunity to diphtheria in Poland in the past 40 years.
abstract: In recent years people in Poland have acquired diphtheria from eastern neighbours. It was considered important therefore to study the age specific immunity against diphtheria and to compare it with the results of seroepidemiological studies conducted in t
authors.forename: A
authors.initials: A
authors.lastname: Zakrzewska
authors.forename: A
authors.initials: A
authors.lastname: Galazka
authors.forename: D
authors.initials: D
authors.lastname: Rymkiewicz