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Titer distribution of positive samples, by exposure group, using the 80% plaque reduction neutralization test
| Titer | Exposed* | Controls |
|---|---|---|
| 1:40 | 2 | 0 |
| 1:160 | 3 | 0 |
| 1:640 | 7 | 0 |
| 1:2560 | 3 | 0 |
| 1:10240 | 1 | 0 |
| Total: | 16 | 0 |
Exposure was defined as close contact through touching and/or coming within 1 m of a ruminant animal during the 12 months before enrollment.
