Effectiveness of COVID-19 Vaccines Against Delta Variant: The Case of the Maldives

Drawing on previous research, this study aimed to assess the impact of COVID-19 vaccines on the Delta variant within the context of the Maldives. Using a retrospective design, the study analyzed comprehensive COVID-19 case data from multiple sources, including the Health Protection Agency (HPA), covering the initial reported cases until the end of December 2021. Notably, the data revealed a surge in Delta variant cases three months after administering the first vaccine dose to more than two-thirds of the population, suggesting a single dose was insufficient against Delta variant. However, following the administration of the second dose and additional restrictions, a gradual decline in COVID-19 cases was observed. These findings underscore the importance of implementing the World Health Organization (WHO)-recommended preventive measures in conjunction with vaccination, particularly when cases begin to rise, as supported by studies from other countries.