Risk of malaria (cases per 100 people) by high (January to May) and low (June to December) malaria transmission seasons, stratified by age group and insecticide type, January 2018 to June 2020
| High transmission* (cases per 100 people over 5 months) | Low transmission* (cases per 100 people over 7 months) | |||||||
| 2018 risk | 2019 risk | 2020 risk | RD 2019 vs 2018 | RD 2020 vs 2018 | 2018 risk | 2019 risk | RD 2019 vs 2018 | |
| Age group | ||||||||
| <5 years | 76.5 | 46.4 | 59.7 | −30.2 | −16.8 | 46.5 | 38.4 | −8.0 |
| ≥5 years | 16.9 | 11.6 | 17.0 | −5.3 | 0.1 | 8.8 | 7.4 | −1.4 |
| All ages | 25.6 | 16.7 | 23.2 | −8.9 | −2.4 | 14.3 | 11.9 | −2.4 |
| Insecticide type | ||||||||
| IRS | 46.1 | 17.0 | 20.0 | −29.1 | −26.1 | 44.0 | 34.4 | −9.6 |
| Pyrethroid | 26.8 | 20.5 | 28.6 | −6.3 | 1.9 | 14.3 | 13.0 | −1.3 |
| PBO | 28.6 | 11.2 | 22.4 | −17.4 | −6.2 | 18.8 | 9.7 | −9.1 |
| Pyrethroid/IRS | 22.8 | 19.7 | 8.2 | −3.2 | −14.6 | 14.1 | 15.8 | 1.8 |
| No data | 7.8 | 4.5 | 6.2 | −3.3 | −1.6 | 3.4 | 3.5 | 0.0 |
CIs were precise to one-tenth of a percent due to the thousands of individuals included in each age group.
High transmission estimates represent 5-month risks, low transmission estimates represent 7-month risks.
*High transmission season: January to May; low transmission season: June to December.
IRS, indoor residual spraying; PBO, piperonyl butoxide; RD, risk difference.