Nigeria has confirmed an Ebola case in its capital, Abuja, after a woman who arrived from Uganda tested positive for the virus.

Axar.az reports, citing The Guardian, that the woman began showing symptoms on 7 October and was admitted to a hospital in Abuja four days later, where she was later diagnosed with Ebola. It is unclear when she arrived in Nigeria, Africa’s most populous country.

The health minister, Muhammad Pate, said authorities had begun tracing 44 people identified as contacts of the patient. “We are doing everything possible to contain this case by tracing all the contacts the individual may have had,” he said.

Uganda’s ministry of health said the patient had only transited through Uganda and that she is a Nigerian woman who had been on a business trip to Congo’s eastern region. The Nigerian authorities have not disclosed her nationality.

“Travel through Uganda does not establish that infection occurred here. The location of exposure remains under investigation,” the ministry said in a statement. The ministry insisted Uganda has “no confirmed active Ebola cases”.