Nigeria’s first Ebola case in more than a decade has again drawn Uganda into reporting on the regional outbreak. But officials say it does not show that Ebola is circulating in Uganda.

Nigeria confirmed on 20 October that a woman with recent travel history to Uganda had tested positive for Bundibugyo Ebola virus disease and was receiving treatment in isolation.

Why it matters: It is the second recent imported case to involve travel through Uganda. Kenya’s first patient, who died this month, had travelled from the Democratic Republic of Congo by road to Kampala before flying to Nairobi.

Uganda’s health ministry said the Nigerian patient had also travelled to the DRC, where the current outbreak began in May. Nigerian authorities have not confirmed that part of her travel history. “Travel through Uganda does not establish that infection occurred here,” the ministry said.

The World Health Organisation says Nigerian investigators are still working to establish the likely source of infection and reconstruct the woman’s travel and exposure history.

The wider picture: Nigeria has identified 44 contacts, most of them health workers, and is tracing passengers from the woman’s flight. The country last recorded Ebola during the 2014 west African epidemic.

Kenya has reported nine cases, all linked to its imported index patient. The patient had lived in the DRC for seven years, travelled through Kampala and reached Nairobi while ill.

Uganda recorded 20 cases and two deaths in May and June, most of them imported from the DRC. The World Health Organisation declared the country Ebola-free in August.

What to watch: Whether Nigeria detects secondary cases among its contacts. WHO advises countries to strengthen surveillance, testing and infection-control systems, but not to restrict travel or trade with affected countries.

The DRC outbreak has spread across eight provinces. WHO recorded 9,637 confirmed cases and 4,646 deaths as of 19 October.