Fig. 4.

Top row: Individual-specific evolutions for the conditional annual FOI obtained using the lower boundary estimator, by study site for children assumed to be symptomatic at the previous visit and who were born in the baseline year (2001). Bottom row: The marginal annual FOI, obtained using the lower boundary estimator, by study site and the infection status at the previous visit and past use of AL (negative and no AL in the past (solid lines), negative and AL in the past (dotted lines), symptomatic (dash-dotted lines) and asymptomatic (long-dashed lines)). Left column, Nagongera; middle column, Kihihi; right column, Walukuba.