In week 51 of 2018, Cholera was monitored in seven countries: Angola, Cameroon, DRC, Niger, Nigeria, Tanzania, and Zimbabwe. In the first week of 2019 cholera was monitored in eight countries: Angola, Burundi, Cameroon, DRC, Niger, Nigeria, Tanzania and Zimbabwe.
In week 51 measles was monitored in 12 countries: Chad, DRC, Ethiopia, Guinea, Kenya, Liberia, Madagascar, Mali, Mauritius, Nigeria, South Sudan, Uganda. In the first week of 2019, measles is also monitored in 12 countries in Chad, DRC, Ethiopia, Kenya, Liberia, Madagascar, Mali, Mauritius, Nigeria, Sierra Leone, South Sudan, Uganda.
Monkeypox, just as it was at the end o 2018, is monitored in 3 countries: Central African Republic, DRC and NIgeria
Hepatitis E is monitored in 3 countries (Central African republic, Namibia, South Sudan) as it was in week 51.
Polio is monitored in the same countries where it was monitored in week 51 (DRC, Mozambique, Niger, Nigeria)
Dengue is now monitored only in Mauritania and Seychelles
Rift Valley Fever
It is monitored only in Mauritania
It is now monitored in South Sudan
In week 51 Yellow Fever was monitored in five countries (Central African Republic, DRC, Guinea, Nigeria, South Sudan). That represented a minor decrease in the geographic distribution of the disease (-Ethiopia) fro a week before, but it represented nonetheless a much wider (geographic) distribution of the disease than in week 41 when Yellow Fever was monitored only in DRC and Nigeria. In the first week of 2019 Yellow Fever is monitored in Central African Republic, DRC, Guinea, Nigeria and South Sudan.
Lassa Fever seems to be expanding its presence in the continent. No country was monitored for lassa fever in week 41, 3 countries (Benin, Liberia, Nigeria) were monitored for lassa fever in week 51 , while in the first week of 2019 lassa fever can also be found in Togo–bringing the total number of countries in which lassa fever is monitored to 4.