Tanzania has pushed back against a report from the World Health Organization warning of a new Marburg virus outbreak in the country.

Following a World Health Organization (WHO) alert 2 days ago about a suspected Marburg virus outbreak in Tanzania, the country's health ministry said yesterday that tests on collected samples were negative for the disease. The WHO had based its alert on reliable in-country sources.

Nine cases of the deadly disease have been reported in the Kagera region of Tanzania so far. But officials expect that number to rise.