Active case-based surveillance for measles in China: lessons learned from Shandong and Henan provinces

Aiqiang X, Zijian F, Wenbo X, Lixia W, Wanshen G, Qing X, Haijun S, Lee LA, Xiaofeng L. Active case-based surveillance for measles in China: lessons learned from Shandong and Henan provinces. J Infect Dis. 2003; 187(Suppl 1): S258-63.