Table 1. Year and number of samples collected in national serum banks of participating countries.

Country or area	Type of sample	Year of collection	Age range collected (years)	No. samples aged < 20 years	No. samples aged ≥ 20 years
Australia	Residual	2002	1–34	2496	1278
Belgium	Residual	2002/2003	1–60+	1953	1421
Bulgaria	Residual	2001–2004	1–60+	969	697
Cyprus	Residual/Population	2003	1–50	1901	1000
Czech Republic	Population	2001	1–60+	1695	1318
England and Wales	Residual	2000	1–60+	1814	1756
Hungary	Residual	2003	1–60+	2014	1476
Ireland	Residual	2003	1–60+	1214	1376
Israel	Residual	1998	1–60+	1866	1484
Latvia	Population	2003	1–60+	1594	1432
Lithuania	Residual	2003	1–60+	1872	1480
Luxembourg	Population	2000/2001	4–60+	1381	1298
Malta	Residual	2003	1–60+	820	1047
Romania	Residual	2002	1–60+	2304	1535
Slovakia	Population	2002	1–60+	2080	1560
Slovenia	Residual	1999/2000	1–60+	2000	1399
Spain	Population	1996	2–39	1926	1679
Sweden	Population	1996/1997	a	994	398

^a Sera collected from 2, 5, 8, 10, 14, 17, 20–34 and 65+ age groups.