
http://ec.europa.eu/transport/sites/transport/files/pocketbook2016.pdf

https://www.ifc.org/wps/wcm/connect/e358c23f-afe3-49c5-a509-034257688580/e-Conomy-Africa-2020.pdf?MOD=AJPERES&CVID=nmuGYF

https://www.science.org/content/article/berlin-new-who-center-aims-keep-eye-emerging-diseases?utm_campaign=news_daily_2021-09-03&et_rid=682362580&et_cid=3907778