Diphtheria control in the former USSR.
Ballmaier
M
M
D001454:Baltic States; D004165:Diphtheria / Q000453:epidemiology / Q000517:prevention & control*; D004168:Diphtheria Toxoid; D006077:Government Agencies; D006801:Humans; D014586:USSR / Q000453:epidemiology; D014944:World Health Organization
D004168:Diphtheria Toxoid