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Number of patients that were sampled 1–5 times for each type of sample collected during the study
| Type of sample | 1 sample | 2 samples | 3 samples | 4 samples | 5 samples |
| Nasal lavage | 0 | 4 | 43 | 9 | 3 |
| Sputum | 0 | 3 | 44 | 9 | 3 |
| Saliva | 5 | 28 | 4 | 1 | 0 |
| Toothbrush | 4 | 22 | 10 | 2 | 0 |
