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    Biosecurity

    Nigeria Stops Ebola Spread by Taking Cues from Polio Program

    By Global Biodefense StaffOctober 20, 2014
    CDC Personnel Conduct Ebola Training in W. Africa
    Image credit: CDC
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    When the first Ebola case was confirmed in July 2014, health officials in Nigeria immediately repurposed polio technologies and infrastructures to conduct Ebola case-finding and contact-tracing. The strategy helped quickly and successfully contain further spread of Ebola in the country.

    For some time now, Nigeria has been running one of the world’s most innovative polio eradication campaigns, using the very latest satellite-based GPS technologies to ensure that no child misses out on polio vaccination.

    The country, which passed through the high-transmission season with only a single case of polio, is on track to interrupt wild poliovirus transmission from its borders before the end of this year.

    The use of cutting-edge technologies, developed with guidance from the WHO polio program, put GPS systems to work as support for real-time contact tracing and daily mapping of links between identified chains of transmission.

    “If a country like Nigeria, hampered by serious security problems, can do this – that is, make significant progress towards interrupting polio transmission, eradicate guinea-worm disease and contain Ebola, all at the same time – any country in the world experiencing an imported case can hold onward transmission to just a handful of cases,” noted by Dr. Margaret Chan, the WHO Director-General.

    Contact Tracing and Community Engagement

    World-class epidemiological detective work would eventually link every single one of the country’s 19 confirmed cases back to direct or indirect contact with that 20 July air traveler from Liberia.

    In another strategy, traditional, religious and community leaders were engaged early on and played a critical role in sensitizing the public. Like many others, the strategy drew on successful experiences in the polio program.

    The awareness campaigns that worked so well to create public acceptance of polio immunization were likewise repurposed to encourage early reporting of symptoms, backed by the message that early detection and supportive care greatly increase an Ebola patient’s prospects of survival.

    Effective Social Mobilization, Border Screenings

    All of these efforts were supported by social mobilization experts from UNICEF, CDC and Médecins sans Frontières, while the staff from the WHO Nigeria office, the Regional Office for Africa and headquarters boosted outbreak investigation, risk assessment, contact tracing and clinical care.

    In the end, Nigeria confirmed a total of 19 cases, of whom 7 died and 12 survived, giving the country an enviable case fatality rate of 40% – much lower than the 70% and higher seen elsewhere.

    Finally, to help maintain the confidence of citizens and foreign companies and investors alike, the government undertook the screening of all arriving and departing travelers by air and by sea in Lagos and Rivers State. The average number of travelers screened each day rose to more than 16 000.

    Risk of Cross-Border Patients Seeking Care in Nigeria

    Nigerian government and health officials, including staff in the WHO country office, are well aware that the country will remain vulnerable to another imported case as long as intense transmission continues in other parts of West Africa.

    The surveillance system remains on guard, at a level of high alert. Moreover, the country’s success, including its low fatality rate, has created another problem that calls for a high level of alert.

    Many desperate people in heavily affected countries believe that Nigeria must have some especially good – maybe even “magical” – treatments to offer.

    WHO experts see a real risk that patients and their families from elsewhere will come to Nigeria in their quest for first-rate, live-saving care.

    Based on the experience gained from the response in the 2 affected States, the national preparedness and response plan has also been revised and refined.

    Nigeria is now serving as a case study for other countries in the region trying to improve their own contact tracing capacities.

    Source: WHO update, adapted.

    Biosafety Ebola Emerging Threats
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