Tanzania has confirmed an outbreak of Marburg virus disease after one person tested positive in the Kagera region of the country.

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

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.

A case of the bleeding virus Marburg has been confirmed in Tanzania, a week after authorities denied there was an outbreak. The deadly illness similar to Ebola is highly infectious, and can kill up to 88% of people without treatment.