International public health researchers have revealed that the lockdown and restrictions imposed in Nigeria between March and May 2020 may have averted not less than 5.8 million infections, thereby recommending another phase of lockdown as the country grapples with rising infections caused by the second wave of the COVID-19 pandemic.
The team of researchers drawn from the United States, South Africa, and Nigeria, said their findings “support the use of restricted mobility as a measure for infection control in Nigeria.”
They, however, pointed out that, even during the lockdown and restrictions, noticeable spikes in people’s movement occurred on weekends, as a result of social events and religious activities.
They observed that the World Health Organization (WHO), Director-General, Dr Tedros Adhanom Ghebreyesus had on January 30, 2020, declared the COVID-19 outbreak a public health emergency of international concern, asking all countries to prepare for containment, active surveillance, early detection, isolation, case management, and contact tracing.
“Most countries including Nigeria (Africa’s largest economy and the most populous country), responded accordingly, and part of the Nigerian government response included socioeconomic and public health interventions to reduce the impact of the pandemic.
“Socioeconomic interventions included providing cash transfers, lines of credit and food assistance to poor and high-risk households, while public health interventions included government-mandated closures and restrictions on schools, social gatherings, and all forms of transportation (locally referred to as lockdown)
The closures and restrictions were initiated on March 30, 2020, and partially eased on May 4, 2020. The researchers used sophisticated statistical techniques to analyze NCDC data on daily infection counts, anonymized Google mobility data from Nigeria (covering about 40 million individuals who activated location history on their smartphone google accounts), and publicly available information on the lockdown (e.g. dates for initiating and partially easing the lockdown).
The cross-sectional study found that government-mandated closures and restrictions in Nigeria owing to COVID-19 was associated with significantly reduced aggregate mobility everywhere (except in residential areas) and may have averted up to 5.8 million coronavirus infections. Additionally, they found that the community spread of COVID-19 in Nigeria may have been faster in residential areas, transit stations (e.g. motor parks), and workplaces (including likely venues of social events).
While stressing that “our findings support the use of restricted mobility as a measure of infection control in Nigeria should there be additional COVID-19 waves in the future”, the researchers pointed out that “restrictions on movement are unsustainable in the long term, and that “future closure and restrictions, if warranted, need to be more effective.
“Suggested areas of improvement include tougher restrictions on movement and more robust contact tracing in residential areas, transit hubs and workplaces, greater testing capacity and more political support for testing; greater access to COVID-19 data for policy and process evaluation to identify opportunities for efficiency gains: and more personal responsibility above and beyond the public health campaign dubbed the 3 Ws (i.e washing hands (or using hand sanitizer regularly wearing a cloth mask over the nose and mouth, and waiting 6 feet apart (or social distancing).”
The research findings which are based on information from confirmed COVID-19 cases provided by the Nigeria Centre for Disease Control (NCDC) from February 27 to July 21, 2020, and Nigeria specific mobility data from Google in the same period, was published by the highly reputable public health journal JAMA Network Open.
The researchers are drawn from institutions in the United States (i.e. Parexel International, Harvard University, and Holly Hill hospital), South Africa (i.e. Sefako Makgatho Health Sciences University), and Nigeria (i.e. Benue State University as well as Universities of Ibadan, Lagos, and Calabar).