Nigeria completes Ebola contact monitoring with no secondary transmission

Nigerian health authorities say they have completed 21 days of monitoring for 62 contacts linked to the country's first Ebola case in more than a decade, with no secondary infections detected. The update was issued by the Nigeria Centre for Disease Control and Prevention after the last monitored contact was discharged. Officials said the result is an important step, but it does not yet mean the outbreak has officially ended.

According to the agency, 13 of the monitored contacts reported fever or other non-specific symptoms during the follow-up period. All of those individuals tested negative for Ebola, and none of the 62 contacts developed the disease. The first confirmed case was reported on October 20 in a Swiss woman who had travelled to Uganda and then returned to Nigeria.

She and her husband were later evacuated to Switzerland, where she recovered fully and has since been discharged from hospital. The NCDC said seven Ebola alerts across five Nigerian states were investigated over the past three weeks, but all of them tested negative. That response reflects the scale of the public-health surveillance effort that followed the imported case.

Ebola spreads through direct contact with bodily fluids from an infected person, or through contaminated materials such as bedding and clothing, making rapid tracing and monitoring central to containment. The latest development matters because Nigeria is still operating under World Health Organization protocol for declaring the end of an outbreak. Under those rules, a country must complete a 42-day countdown from the recovery or departure of the last confirmed patient before an official declaration can be made.

That means the absence of secondary transmission so far is encouraging, but it is not yet the final step in the process. The case also sits within a wider regional outbreak that was first identified in Ituri in eastern Democratic Republic of the Congo in May. Since then, Ebola cases have been reported in eight provinces in the DRC, as well as in Uganda, France, Kenya and Nigeria, according to the information provided.

The supporting material says the DRC outbreak is the second-largest on record and has infected more than 11,000 people, killing more than 5,000. What remains unclear is whether any further alerts will emerge during the remaining countdown period and whether Nigeria will reach the threshold for an official end-of-outbreak declaration without new cases. Health authorities will continue to watch for symptoms and test any suspected infections.

The key issue now is whether the country can complete the full 42 days without another confirmed case.

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