Characteristics of national serum surveys for eight participating countries
| Country | Year of collection | Total number of sera collected | Age distribution of sera | Sera sex distribution (male:female) | Source of sera | Reference | |||
|---|---|---|---|---|---|---|---|---|---|
| (0–9 years | 10–19 years | 20–39 years | >39 years) | ||||||
| *Pregnant women only. | |||||||||
| †General population ⩾18 years old. | |||||||||
| Belgium | 1999–2000 | 3892 | 909 (23%) | 1007 (26%) | 988 (25%) | 988 (25%) | 49.1%:50.9% | Residual sera | Mathei et al22 |
| Bulgaria | 1999 | 3200 | 450 (14%) | 486 (15%) | 1014 (32%) | 1250 (39%) | 49.7%:50.3% | Population based | Gatcheva et al26 |
| Czech Republic | 1989 | 4000 | 902 (23%) | 1060 (27%) | 1037 (26%) | 1000 (25%) | 49.9%:50.1% | Population based | Kriz et al47 |
| Finland | 1997–8 | 3346 | 779 (23%) | 797 (24%) | 870 (26%) | 900 (27%) | 53.4%:46.6% | Residual sera | NA |
| Germany | 1997 | 3792 | 0 (0%) | 244 (6%) | 1571 (41%) | 1977 (52%) | 50.3%:49.7% | Population based† | Thefeld et al25 |
| Netherlands | 1996 | 7166 | 1212 (17%) | 979 (14%) | 1562 (22%) | 3413 (48%) | 47.4%:52.6% | Population based | De Melker et al24 |
| Slovenia | 1993 | 3000 | 0 (0%) (<10 years) | 664 (22%) (10−19 years) | 2336 (78%, 20+years) | 0%:100% | Residual sera* | Klavs et al23 | |
| England and Wales | 1994 | 4948 | 1000 (20%) | 1000 (20%) | 1842 (37%) | 1106 (23%) | 47.5%:52.5% | Residual sera | Vyse et al15 |