Mitigating the Effects of COVID-19 through Vaccination: Evaluating Leading Countries across Continents of the World

Abstract

This research investigates COVID-19 vaccine efficacy across six countries: India, South Africa, France, Australia, the USA, and Brazil, examining their impact on reducing deaths and containing the virus. It analyzes vital epidemiological metrics during pre-vaccination and post-vaccination periods until February 5, 2023. The countries are grouped by their Aridity Index, reflecting climate variations. Employing Pearson correlation, the study explores the relationship between the Aridity Index and vaccination period rates, noting some moderate associations but lacking statistical significance at a 5% level. Comparing case fatality and infection rates before and during vaccination showed no significant differences. However, incidence rates displayed a notable discrepancy at the 5% significance level. The study underscores the need for non-pharmaceutical measures alongside vaccination efforts to mitigate the increase in incidence and infection rates. It emphasizes that while COVID-19 vaccinations play a crucial role, complementary measures remain essential in effectively managing the pandemic. Overall, this research offers critical insights into vaccine efficacy across diverse countries, advocating a continued multi-faceted approach to combat the global health crisis.