Provider: Japan Science and Technology Agency Database: J-STAGE Content:text/plain; charset="utf-8" TY - JOUR TI - Principles and Methods of Influenza Epidemiology: With Special Reference to Field Evaluation of Vaccine Efficacy TI - AU - HIROTA,Yoshio AU - KAJI,Masaro JO - Journal of the Japanese Association for Infectious Diseases VL - 68 IS - 11 SP - 1293 EP - 1305 PY - 1994 DO - 10.11150/kansenshogakuzasshi1970.68.1293 ER -