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Measles outbreak response immunization during the COVID-19 pandemic: lessons from Borno State, Nigeria
Terna Nomhwange1, Abede Mohammed2, Anne Eudes Jean Baptiste1
1World Health Organization, Country Office, Abuja, Nigeria.
Introduction:
the COVID-19 outbreak was declared a public health emergency of international concern by the WHO on the 30th January 2020. The occurrence of measles outbreaks in the context of COVID-19, both highly infectious respiratory illnesses, impacts additional challenges to the health system in a state with an ongoing humanitarian crisis. This article documents the implementation of an outbreak response immunization (ORI) during the COVID-19 pandemic and the implementation of global guidelines for mass vaccination.
Methods:
a retrospective review of the response to measles outbreak implemented in Borno state across six local government areas (LGAs) in 2019 was conducted. This review assessed the utilization of the World Health Organization (WHO) decision making framework, measles and COVID-19 epidemiological reports and the measle's vaccination response data.
Results:
an outbreak response immunization was implemented in six LGAs in Borno State, with a validated post campaign coverage of 96.3% (95% CI: 93.0 - 98.1). In total, 181,634 children aged 9 months-9 years were vaccinated with 27,961 (15.4%) receiving the measles vaccine for the first time. Prior to the interventions, 20 COVID-19 cases were reported in the six LGAs while only seven suspected cases were reported with only two cases confirmed in one of the six LGAs four weeks after the ORI.
Conclusion:
the WHO decision-making framework for implementing mass vaccinations in the context of the COVID-19 Pandemic was utilized for the outbreak response immunization in Borno State, Nigeria with 181,634 children aged 9 Months-9 years vaccinated with the measles vaccine. The use of the WHO decision-making framework to assess risk benefits of initiating mass vaccination campaigns remains a very important practical tool. These types of responses in Nigeria and other low and middle income countries (LMICs), with hitherto suboptimal immunization coverage and weak health systems and other settings, affected by humanitarian emergencies is essential in the achievement of the regional measle's elimination targets.
Insights
During the COVID-19 pandemic, a measles outbreak response immunization in Borno State, Nigeria, vaccinated 181,634 children. The successful campaign achieved 96.3% coverage, demonstrating effective public health strategies in humanitarian crises.
Area of Science:
- Public Health
- Epidemiology
- Immunization Programs
Background:
- The COVID-19 pandemic presented significant challenges to ongoing public health initiatives, including routine immunization and outbreak response.
- Measles outbreaks occurring concurrently with COVID-19 exacerbated the strain on health systems, particularly in humanitarian crisis settings like Borno State, Nigeria.
Approach:
- A retrospective review was conducted to assess the implementation of a measles outbreak response immunization (ORI) in six Local Government Areas (LGAs) of Borno State.
- The review evaluated the utilization of the World Health Organization (WHO) decision-making framework, alongside epidemiological data for both measles and COVID-19.
- Vaccination response data from the measles campaign was analyzed to determine coverage and impact.
Key Points:
- An ORI campaign successfully vaccinated 181,634 children aged 9 months to 9 years, achieving a validated post-campaign coverage of 96.3%.
- Approximately 15.4% of vaccinated children received the measles vaccine for the first time, indicating an expansion of immunization reach.
- Following the intervention, there was a notable decrease in reported COVID-19 cases in the targeted LGAs, from 20 to 7 suspected and 2 confirmed cases within four weeks.
Conclusions:
- The WHO decision-making framework proved to be a valuable tool for assessing risks and benefits of mass vaccination during the COVID-19 pandemic.
- Effective outbreak response immunization strategies are crucial for achieving regional measles elimination targets, especially in low and middle-income countries (LMICs) facing humanitarian emergencies and weak health systems.
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