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Seroprevalence of Anti-cytotoxin-associated gene A IgG (Anti-CagA IgG) in asymptomatic subjects according to age groups and sex. Comparisons of anti-CagA IgG seropositivity for different age groups showed that ≤ 20 years age group had the highest rate and 51-60 years age group had the lowest rate. The prevalence of serum anti-CagA IgG was higher in males compared to females except for subjects ≤ 20 years of age
