From: Benefits of annual chemotherapeutic control of schistosomiasis on the development of protective immunity
S. haematobium
infected
uninfected
Reinfection Cases
6 weeks
 Boys
1 (0.95%)
104 (99.05%)
–
 Girls
0 (0%)
107 (100%)
2 years
103 (99.03%)
1 (0.96%)