Incidence (%) of adverse drug reactions (ADRs)
| Country | Incidence (%) (95% CI) |
| ADRs in hospitalised children | |
| Norway12 | 18.1 (15.0 to 21.3)* |
| France17 | 2.7 (0.6 to 4.8) |
| Brazil18 | 12.5 (8.5 to 16.4) |
| Germany19 | 19.9 (13.6 to 26.2) |
| Germany20 | 12.5 (9.2 to 15.9) |
| Nigeria21 | 1.5 (0.6 to 2.4) |
| Meta-analytic weighted average | 10.9 (4.8 to 17.0) |
| ADRs leading to hospital admission | |
| Norway12 | 5.8 (4.3 to 7.3) |
| France17 | 1.5 (0.0 to 3.0) |
| Sri Lanka22 | 0.2 (0.1 to 0.2) |
| Nigeria21 | 0.6 (0.0 to 1.2) |
| Meta-analytic weighted average | 1.8 (0.4 to 3.2) |
| ADRs in outpatient children | |
| France17 | 0.7 (0.2 to 1.1) |
| France23 | 1.4 (0.8 to 2.0) |
| Meta-analytic weighted average | 1.0 (0.3 to 1.7) |
*Only data referring to ADRs were included.