AO: There is very little transparency on this site about the sources for this data. The only section where I was able to find links to a source (other than the Google data) was the second data visualization on "Africa: Confirmed COVID-19 Cases" which states the source as Worldometer Data https://www.worldometers.info/coronavirus. When I dug further into what the sources of the Worldometer Data are, I found this:
"Our sources include Official Websites of Ministries of Health or other Government Institutions and Government authorities' social media accounts. Because national aggregates often lag behind the regional and local health departments' data, part of our work consists in monitoring thousands of daily reports released by local authorities. Our multilingual team also monitors press briefings' live streams throughout the day. Occasionally, we can use a selection of leading and trusted news wires with a proven history of accuracy in communicating the data reported by Governments in live press conferences before it is published on the Official Websites."
They provide some details on some of their country specific sources, but not a single country in Africa has its data sources explicitly identified leading me to question their physical reach on the continent. Furthermore, if the majority of their sources are official government ministries which are already being critiqued for their data and reporting... this causes me to again question the validity of all of these data visualizations.