Trends in uptake and impact of thermostable vaccines in Africa.

Vaccination in Africa faces significant challenges due to inadequate cold chain infrastructure, particularly in regions lacking reliable electricity. Approximately 80% of prequalified vaccines require cold chain systems to maintain their potency, which is often unfeasible in remote areas. Exposure to extreme temperatures can lead to a loss of vaccine potency, making it crucial to explore alternatives. Thermostable vaccines represent a technological advancement that addresses these challenges by eliminating the need for cold chain mechanisms during transport and storage. This narrative review analyzes trends in the uptake of thermostable vaccines and their impact across Africa. A total of 10 studies were reviewed, encompassing 14 African countries, revealing critical insights into the potential of thermostable vaccines to enhance immunization coverage in settings with limited access to traditional cold chain facilities. These vaccines, which maintain their efficacy even when exposed to higher temperatures for short periods, offer a promising solution to the logistical and economic hurdles of vaccine delivery in resource-limited settings.