CD40LG and infection: It shows the adjusted seroprevalence estimates by age group for recent infection (anti-HEV IgM+ / IgG±), past infection with HEV (anti-HEV IgM- / IgG+) and susceptibility for HEV infection (anti-HEV IgM- / IgG-) in Am Timan during this seroprevalence survey.