Emerging and Re-Emerging Viral Infections: Trends in Africa

The emergence and reemergence of viral infections pose significant public health challenges in Africa. This narrative review examines the trends, epidemiology, and contributing factors behind viral outbreaks on the continent. The review highlights major viral diseases such as Ebola, Lassa fever, monkeypox, Rift Valley fever, and COVID-19, emphasizing their impact on morbidity and mortality. Key drivers of viral emergence include ecological disruption, human behavioral factors, globalization, and viral genetic evolution. The chapter also explores regional distribution patterns, with Ebola and Lassa fever predominantly affecting West Africa, while monkeypox and Marburg virus disease remain concerns in Central Africa. Additionally, vector-borne infections such as dengue, chikungunya, and yellow fever persist in East and West Africa. Public health strategies to mitigate viral threats involve integrated surveillance systems, the One Health approach, vaccine deployment, and vector control measures. However, challenges such as weak healthcare infrastructure, limited genomic surveillance, and vaccine inequity hinder effective disease control. This underscores the need for strengthened pandemic preparedness, improved disease monitoring, and multidisciplinary collaborations to curb future outbreaks. Addressing these challenges through sustained investment in public health infrastructure and international cooperation is essential to safeguarding African populations against emerging and reemerging viral infections.