TABLE 1.

Age-Specific EV71 Seropositivity Rates After the Epidemic in 4 Counties and 2 Major Cities of Taiwan

Age in YearsTaipei City*Taoyuan County*Taichung County*Kaohsiung City*Kaohsiung County*Ilan County*Total
<0.57% (29)13% (56)12% (43)10% (48)24% (55)8% (60)12% (291)
0.5–0.90% (30)15% (54)0% (42)3% (58)9% (54)15% (60)8% (298)
1–1.98% (39)30% (102)14% (58)5% (82)12% (65)18% (61)16% (407)
2–2.911% (35)36% (97)30% (60)15% (81)25% (32)15% (60)24% (365)
3–5.934% (70)49% (224)51% (97)26% (137)40% (141)49% (61)42% (730)
6–1156% (69)58% (168)65% (86)57% (166)61% (211)79% (61)61% (761)
12–1954% (48)60% (160)81% (114)56% (166)68% (99)74% (61)65% (648)
20–2960% (42)55% (93)73% (60)58% (55)63% (48)78% (60)64% (358)
30–4948% (84)47% (91)75% (77)72% (88)67% (89)50% (60)60% (489)
≥5053% (38)53% (36)82% (55)88% (25)75% (57)54% (61)67% (272)
All ages37% (484)46% (1081)54% (692)40% (906)49% (851)44% (605)46% (4619)
  • Numbers in parentheses are total numbers of tested samples.

  • * Blood samples were taken in Taoyuan, Kaohsiung, and Ilan Counties in January 1999, Taichung County in April 1999, Taipei City in May-June 1999, and Kaohsiung City in July 1999.