S. japonicum infection prevalence and intensity at follow-up.

*Cohort 1 is composed of people from 10 villages where schistosomiasis is endemic. Participants were tested for S. japonicum infection in 2000 (T0), 2002 (T1) and 2006 (T2).†Cohort 2 is composed of people from 27 villages in two counties where schistosomiasis reemerged following reduction of S. japonicum infection prevalence below 1%. Participants were tested for S. japonicum infection in 2007 (T0), 2008 (T1) and 2010 (T2).‡Infection prevalence and intensity were estimated for the source population, accounting for the stratified sampling used in enrolling cohort participants. Each individual in the cohort was assigned a weight equal to the inverse probability of being sampled.

*队列1（Cohort 1）由血吸虫病（schistosomiasis）流行区的10个村庄的居民组成。研究分别于2000年（T0）、2002年（T1）及2006年（T2）对受试者进行日本血吸虫（S. japonicum）感染检测。
*队列2（Cohort 2）由两个县的27个村庄的居民组成，这两个县在日本血吸虫感染率降至1%以下后出现了血吸虫病复燃现象。研究分别于2007年（T0）、2008年（T1）及2010年（T2）对受试者进行日本血吸虫感染检测。
*研究针对源人群估算了感染率与感染强度，并校正了队列招募过程中采用的分层抽样方案。队列中的每名个体均被分配一个权重，该权重等于其被抽样概率的倒数。