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Nigeria: Yellow Fever Outbreak - Sep 2017

Disaster types

On 15 September 2017, the Nigeria Federal Ministry of Health notified WHO of a confirmed yellow fever case in Ifelodun Local Government Area (LGA), Kwara State...Based on the available information, the likelihood of further spread among the local population is moderate. As the affected area is over 250 km from the nearest international border (Benin), the risk of regional spread is currently low. This event, nevertheless, further drains an already stretched public health system in Nigeria. Kwara State is recovering from a large cholera outbreak (last cases reported in week 27 of 2017), while the country continues to respond to several concurrent public health emergencies in other states. (WHO, 22 Sep 2017)

The Government of Nigeria has launched a campaign to immunize 873,837 people against yellow fever in the states of Kwara and Kogi. The ten-day campaign began on Friday (13 October) and mobilizes more than 200 health workers and volunteers. It targets residents aged 9 months to 45 years old. (WHO, 16 Oct 2017)

As of 26 October 2017, a total of 166 cases of acute jaundice syndrome and 10 deaths (case fatality rate 6%) have been reported from six states (namely Abia, Borno, Kwara, Kogi, Plateau, and Zamfara)...Additional vaccination campaigns in the affected areas are planned for December 2017. (WHO, 3 Nov 2017)

The outbreak of yellow fever in Nigeria continues to evolve, with new states being affected – the latest being Kano State. During week 46 (week ending 19 November 2017), two new confirmed yellow fever cases were reported from Kogi State – based on test results from the Institute Pasteur Dakar (IPD). During the reporting week, 10 probable cases (positive test results from national laboratories) were reported from three states, namely Kogi (8 cases), Nasarawa (1 case) and Kano (1 case). (WHO, 1 Dec 2017)

From 2 July through 19 December 2017, 341 suspected cases of yellow fever have been reported from 16 states, including Abia, Anambra, Borno, Edo, Enugu, Kano, Katsina, Kogi, Kwara, Kebbi, Lagos, Nasarawa, Niger, Oyo, Plateau, and Zamfara states. Six states have reported confirmed cases of yellow fever (Kano, Kebbi, Kogi, Kwara, Nasarawa and Zamfara).

A total of 358 suspected cases have been reported from sixteen states: Abia, Anambra, Borno, Edo, Enugu, Kano, Katsina, Kebbi, Kogi, Kwara, Lagos, Nasarawa, Niger, Oyo, Plateau, and Zamfara. Thirty-three cases from seven states (Kano, Kebbi, Kogi, Kwara, Nasarawa, Niger, and Zamfara) have been laboratory-confirmed at IP Dakar.(WHO, 12 Jan 2018)

The Government of Nigeria will launch a mass vaccination campaign to prevent the spread of yellow fever on Thursday (January 25) with support from the World Health Organization (WHO) and partners. More than 25 million people will be vaccinated throughout 2018, in the largest yellow fever vaccination drive in the country’s history. (WHO, 24 Jan 2018)

World Health Organization (WHO), UNICEF and other partners are supporting the Federal Government and Borno State Ministry of Health to vaccinate more than 1.2 million internally displaced persons (IDPs) across 57 wards in 25 Local Government Areas in Borno State. The campaign began on 5 February, and is expected to continue until 14 February 2018. (WHO, 07 Feb 2018)

From the onset of this outbreak on September 12, 2017, a total of 1,711 suspected yellow fever cases have been line-listed as at week 15 [9th – 15th April, 2018]... Total number of deaths in all cases (suspected, probable and confirmed cases) is 47, while 10 deaths were recorded among confirmed cases only. Therefore, the case fatality ratio (CFR) for all cases (including suspected, probable and confirmed) is 2.7%, and 24.4% for confirmed cases. (Gov't, 15 Apr 2018)

All Nigerian states have reported suspected cases in 570 (73.6%) LGAs... From the onset of this outbreak in September 12, 2017, a total of 3,456 suspected yellow fever cases have been reported as at week 45