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| Study characteristics | ||
| Study design | Cohort study | |
| Intervention | RFID‐enabled sensors | |
| Disease/setting | School in USA | |
| Device: face‐to‐face < 2 metres Survey: 1‐day recall of contacts who were maximum of 2 arm‐lengths apart, at least 10 words spoken, and at school |
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| Notes | ||
