TY  - GEN
AU  - TSUDA,T
TI  - Studies on the herd immunity of schoolchildren against diphtheria. 1. Schick negative rate of schoolchildren and booster immunization
SN  - 0044-0531
PY  - 1998///1101
KW  - Diphtheria
KW  - Humans
KW  - Immunity, Herd
KW  - Immunization, Secondary
N1  - Publication Type: Journal Article
ER  -