Tanzania has confirmed a new case of Marburg virus disease in the northwestern Kagera region, following 25 negative tests. Dozens of individuals remain under observation as the government works to contain the outbreak.

Yesterday the World Health Organization (WHO) said Tanzania has 1 confirmed case of Marburg and 25 suspected cases all from the northwestern Kagera region. So far all 25 suspected case-patients have tested negative for the virus but remain under close surveillance.

Officials previously questioned whether the deadly disease was indeed present in the African country, which had seen 8 suspected Marburg deaths.