Ugandan authorities have begun a clinical trial of a vaccine against the Sudan strain of Ebola that has killed one person in the outbreak declared last week.

Nine people were confirmed to have Ebola virus in Uganda and around 265 others are being monitored under quarantine, health authorities have said. The nine include the first victim, a male nurse who died the day before the outbreak was declared on January 30.

The Ugandan health ministry has said the number of confirmed Ebola cases in the country has risen from three to nine. Recall that the East African country last month declared an outbreak of the severe,