|  |  | Median value (range) |  | Median value (range) |  | Median value (range) |  |
---|---|---|---|---|---|---|---|---|
Outbreak characteristics | Â | Number of outbreaks | Duration of outbreaks (months) | p | Cases (number) | p | Fatality rate (%) | p |
Location | EU | 16 | 11 (1–145) | 0.3849a | 5 (1–86) | 0.4815a | 0 (0–100) | 0.4705a |
 | USA | 17 | 5 (2–40) |  | 9 (1–38) |  | 0 (0–16.7) |  |
Clinical condition | Neoplasia | 4 | 10 (3–25) | 0.5059a | 6 (2–11) | 0.4391a | 40.9 (0–100) | 0.0215 a |
 | Other | 29 | 5(1–145) |  | 8 (1–86) |  | 0 (0–40.0) |  |
Transmission pathways | Multi-vials | 10 | 3.5 (1–14) |  | 6.5 (2–29) |  | 0 (0–81.8) |  |
 | Capillary blood sampling. | 9 | 9 (2–16) |  | 11 (3–27) |  | 0 (0–40.0) |  |
 | Standard†| 3 | 24 (4–40) |  | 31 (14–38) |  | 0(-) |  |
 | Transvenous biopsy | 3 | 124 (54–145) | 0.0303 b | 63 (20–86) | 0.0012 b | 0(-) | 0.6384b |
 | Blood product | 2 | 13.5 (2–25) |  | 3 (1–5) |  | 0(-) |  |
 | Undefined | 6 | 4.5 (2–17) |  | 2.5 (1–6) |  | 0 (0–100) |  |
Setting | Dialysis | 10 | 3.5 (2–17) |  | 4 (1–14) |  | 0 (-) |  |
 | Others | 23 | 9 (1–145) | 0.0248 a | 11 (1–86) | 0.0240 a | 0 (0–100) | 0.1165a |
 | Total | 33 | 6 (1–145) | - | 7 (1–86) | - | 0(0–100) | - |