Table 2 Summary of ELISA scores sorted by country of origin
ELISA score | No. (%) of sera collected in the country indicated | Total no. (%)a | |
|---|---|---|---|
United Statesa | Canadaa | ||
0 (Negative) | 1475 (92.9) | 1593 (93.3) | 3068 (93.1) |
1+ (Weakly positive) | 65 (4.1) | 61 (3.6) | 126 (3.8) |
2+/3+ (Moderately positive) | 32 (2.0) | 41 (2.4) | 73 (2.2) |
4+/5+ (Strongly positive) | 15 (0.9) | 13 (0.8) | 28 (0.8) |
Total | 1587 | 1708 | 3295 |