Table 2.
Meta-analysis of the contact history.
| Contact | n | Proportion [95% CI] |
|---|---|---|
| Contact history | 54 | 0.794 [0.7651; 0.8240] |
| Digestive tract contact | 31 | 0.115 [0.0844; 0.1567] |
| Unknown | 43 | 0.167 [0.1347; 0.2077] |
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