R. Zhang

National poliomyelitis immunization days--People's Republic of China, 1993.

Z. Wang, B. Yang, Z. Dai, 1993, MMWR. Morbidity and mortality weekly report.

Effect of target age of supplemental immunization campaigns on poliomyelitis occurrence in China.

R. Linkins, S. Cochi, J. Yu, 1997, The Journal of infectious diseases.

Surveillance for polio eradication in the People's Republic of China.

X. L. Zhang, M. Otten, K. Wang, 1997, The Journal of infectious diseases.

Status of the eradication of indigenous wild poliomyelitis in the People's Republic of China.

X. L. Zhang, T. Xu, M. Liu, 1997, The Journal of infectious diseases.

Costs of polio immunization days in China: implications for mass immunization campaign strategies.

X. L. Zhang, A. Schnur, J. Yu, 1998, The International journal of health planning and management.

Eradication of poliomyelitis: progress in the People's Republic of China.

M. Otten, B. Yang, K. Wang, 1995, The Pediatric infectious disease journal.