The World Health Organization (WHO) has launched campaigns to boost immunization rates to 70 percent globally by the middle of 2022. However, despite the global success of about 64% COVID-19 vaccination coverage, there is a big gap in Nigeria. To date, only 13.8% of the population has received the recommended dose. This demonstrates a significant disparity between the vaccinated and the unvaccinated. Amidst the wide gap in vaccination, COVID-19 vaccine wastage still occurs in Nigeria. At the end of 2021, it was estimated that over a million doses of the COVID-19 vaccine had been wasted. It is anticipated that there will be more COVID-19 vaccine wastage in Nigeria, because of the combined factors that threaten vaccination uptake including vaccine hesitancy, lack of appropriate storage facilities, poor electricity supply, insecurity challenges, and inadequate health promotion. This results in concomitant financial and opportunity losses. In this paper, we discuss COVID-19 vaccine wastage in Nigeria including causes, and solutions that can be applied to mitigate this wastage.

Background: The planning and management of health policy is directly linked to evidence-based research. To obtain the most rigorous results in research it is important to have a representative sample. However, ethnic minorities are often not accounted for in research. Migration, equality, and diversity issues are important priorities which need to be considered by researchers. The aim of this systematic review (SR) is to explore the literature examining the experiences of minority language users in Health and Social Care Research (HSCR). Method: A SR of the literature was conducted. SPIDER framework and Cochrane principles were utilized to conduct the review. Five databases were searched, yielding 5311 papers initially. A SR protocol was developed and published in PROSPERO: https://www.crd.york.ac.uk/prospero/display_record.php?ID=CRD42020225114analysis. Results: Following the title and abstract review by two reviewers, 74 papers were included, and a narrative account was provided. Six themes were identified: 1. Disparities in healthcare; 2. Maternal health; 3. Mental health; 4. Methodology in health research; 5. Migrant and minority healthcare; 6. Racial and ethnic gaps in healthcare. Results showed that language barriers (including language proficiency) and cultural barriers still exist in terms of recruitment, possibly effecting the validity of the results. Several papers acknowledged language barriers but did not act to reduce them. Conclusion: Despite research highlighting cultures over the past 40 years, there is a need for this to be acknowledged and embedded in the research process. We propose that future research should include details of languages spoken so readers can understand the sample composition to be able to interpret the results in the best way, recognising the significance of culture and language. If language is not considered as a significant aspect of research, the findings of the research cannot be rigorous and therefore the validity is compromised.