On Mar. 21, 2023, the Ministry of Health of the United Republic of Tanzania declared an outbreak of Marburg virus disease in the country. As of Mar. 22, a total of eight cases, including five deaths (case fatality ratio [CFR]: 62.5%) had been reported from two villages in Bukoba district, Kagera region.

The first identified case reported travel history from Goziba Island in Lake Victoria in Tanzania and developed symptoms after returning to his village in Bukoba.