| Authors | Country | Period | n | Children < 5 y (%) | Death-rate (%) |
| Kaishusha et al. | D.R. Congo | 2021-2022 | 100 | 30% | 1% |
| Bengono et al. [8] | Cameroon | 2013-2017 | 158 | 96% | 3.2% |
| Diallo T et al. [9] | Mali | 2000-2010 | 1323 | 37% | 2.5% |
| Obu et al. [10] | Nigeria | 2014-2018 | 20 | 65% | 1.5% |
| Edelu et al. [11] | Nigeria | 2003-2012 | 65 | 100% | 3.1% |