Nigeria Faces 42-Day Wait Before Ebola-Free Declaration, WHO Says

Nigeria will have to complete a 42-day monitoring process before it can officially be declared free of Ebola, despite having no known active cases following the medical evacuation of its only confirmed patient to Switzerland.

The World Health Organisation (WHO) says the waiting period is necessary to establish that the virus has not spread to other people following the confirmation of an imported case of Ebola Bundibugyo virus disease in the country.

The clarification means that the absence of an active case does not automatically mark the end of the public health incident. Authorities must continue monitoring identified contacts and follow established procedures before announcing that transmission has been interrupted.

According to the WHO, health officials identified 53 contacts associated with the confirmed patient. Those contacts include people who may have been exposed to the infected woman during the period relevant to the investigation.

The development follows the confirmation of Nigeria’s first imported case of Ebola Bundibugyo virus disease in the current outbreak on October 20, 2026.

The patient, a 42-year-old woman with a recent travel history to Uganda, developed symptoms after arriving in Nigeria and sought medical attention at a private health facility in Abuja. Laboratory testing subsequently confirmed the infection.

The case prompted health authorities to begin contact tracing and other measures aimed at identifying possible exposures and preventing further transmission. The patient was isolated and treated by Nigerian medical personnel before being medically evacuated to Switzerland.

Why the 42-day period matters

Chikwe Ihekweazu, executive director of the WHO Health Emergencies Programme, explained that health authorities must first monitor the identified contacts for 21 days, followed by an additional 21-day period before Nigeria can be declared Ebola-free.

The process is intended to give public health officials time to determine whether anyone else has developed the infection following exposure to the confirmed patient.

The monitoring period is therefore not simply a waiting period. It is part of the process used to establish that an outbreak has ended and that no further transmission has been detected.

The evacuation of the patient has changed Nigeria’s immediate case situation, but it has not removed the need for continued surveillance.

WHO officials have clarified that the country currently has no known active cases following the evacuation, while Nigerian authorities continue to monitor the contacts who remain in the country.

The patient’s husband, who was also evacuated, is being monitored by Swiss authorities. This means the response involves coordination between health officials in both countries.

Health authorities continue surveillance

The Nigeria Centre for Disease Control and Prevention and other relevant health agencies remain responsible for following up with contacts in Nigeria and ensuring that public health measures are maintained.

Contact monitoring is an important part of containing infectious diseases because people exposed to a confirmed case may require observation even when they have not developed symptoms.

Health authorities must also remain alert to any suspected infections and ensure that people who develop relevant symptoms receive appropriate medical assessment.

The WHO has stressed that the requirement for a 42-day period follows established outbreak-control protocols. The clarification also addresses confusion surrounding earlier reports that Nigeria had no active Ebola cases, which some readers interpreted as an immediate declaration that the country was Ebola-free.

Having no active cases and officially declaring an outbreak over are separate milestones. The first describes the current case situation, while the second requires authorities to establish that the necessary conditions have been met.

For Nigeria, the priority is now to complete the monitoring process while preventing further transmission. The outcome will depend on continued surveillance, cooperation from identified contacts and the timely reporting of any suspected cases.

Until the required period has been completed and the appropriate criteria met, Nigeria cannot be officially declared free of the outbreak.