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Table 3 Prevalence of susceptibility to HAV infection by age class

From: Hepatitis A in Puglia (South Italy) after 10 years of universal vaccination: need for strict monitoring and catch-up vaccination

Age class (years) Years of birth No. Tested Susceptibility (%) 95% CI
≤5 2008-2003 103 72 (69.9) 61.04-78.76
6-10 2002-1998 103 73 (70.9) 62.10-79.65
11-15 1997-1993 86 56 (65.1) 55.04-75.19
16-20 1992-1988 113 25 (22.1) 14.47-29.78
21-25 1987-1983 100 70 (70.0) 61.02-78.98
26-30 1982-1978 108 75 (69.4) 60.76-78.13
31-35 1977-1973 126 71 (56.3) 47.69-65.01
36-40 1972-1968 129 60 (46.5) 37.90-55.12
Total   868 502 (57.8) 54.55-61.12