Africa lacks the capacity to manufacture its own vaccines. As a result, combined with other factors such as limited health care infrastructure, vaccination rates across the continent remain lower than in many other parts of the world. Since building high-functioning manufacturing facilities would be both difficult and costly, organizations such as the World Health Organization (WHO) and UNICEF are seeking practical, feasible ways to expand vaccine access in Africa.

Why Vaccine Delivery Remains a Challenge

Although many vaccines are available today, low vaccination rates in Chad and Sudan mean that only a few can be prioritized immediately. In 2024, Gavi, the Vaccine Alliance, launched pneumococcal, rotavirus and malaria vaccines in Chad. This approach centers on reducing vaccine-preventable deaths, making these vaccines the most immediately impactful.

Vaccines are not widely manufactured in Africa and are often transported from overseas. Most also need to be stored at specific temperatures to remain effective. Adding to the challenge, each vaccine requires its own storage conditions. For this reason, the Centers for Disease Control and Prevention provides a detailed toolkit on vaccine storage and handling.

The cold chain is the critical system that allows vaccines to reach their destination safely and remain usable. If required temperatures are not maintained throughout the process, vaccines can lose potency and health workers must discard them. This means that everyone involved in the cold chain process, from transport personnel to staff managing refrigeration at medical facilities, requires specialized training. 

It also demands strong infrastructure and tightly coordinated logistics to ensure there are no gaps in storage or delivery. Because cold chain delivery and storage require such close oversight, the UNICEF Supply Division treats them as a major operational priority.

The Status Quo

While the vaccine cold chain requires particular attention, refrigeration is also essential for many other perishable supplies that must be transported to especially hot climates, such as Chad and Sudan. According to the WHO’s Communications Officer for News and Media, the organization published an evidence brief for this reason. Titled “Solar direct-drive vaccine refrigerators and freezers,” the brief explains how solar power can play a particularly important role in vaccine storage. 

Because electricity is unreliable in many parts of Chad and Sudan, clinics and transporters often rely on kerosene and gasoline to power cold chain storage and refrigeration. Unfortunately, these fuel-powered systems are both costly and difficult to maintain. Rising prices and supply chain disruptions can also make kerosene and gasoline hard to keep in stock. 

In addition, because these fuels are used with absorption refrigeration systems rather than the more reliable electric refrigerators, reliability remains a major concern.

Where Do Solar Panels Come In?

As demand for reliable energy grows, researchers are exploring alternatives to fossil fuels. Beyond climate concerns, fossil fuels are finite and increasingly expensive. While no energy source currently known to scientists is without cost, many groups have spent years searching for sustainable options with the lowest possible operating costs.

While energy needs vary across regions, Northern Africa’s arid climate and abundant sunshine make solar power a strong candidate for a major energy source. Globally, CleanEnergy predicts that solar power will become a leading source of energy generation by 2050. WHO and UNICEF, alongside partners such as the World Bank, are actively scaling up solar energy to stabilize critical health, water and education services in Chad and Sudan.

Barriers To Creating a Solar-Powered Vaccine Cold Chain

Transitioning to new energy sources does not come without cost. Although sunshine is abundant in Northern Africa, installing solar panels would require a major investment. While exact figures are unclear, providing solar-powered refrigeration and cold chain storage for vaccines in Chad and Sudan would likely require large organizations such as the WHO and UNICEF to purchase and install a significant number of solar panels.

There would also be initial challenges in integrating solar energy into existing power systems. Although this would likely be a short-term issue, failures during the transition could lead to the loss of vaccines and other perishable supplies. In addition, while Chad and Sudan are still developing their solar regulatory frameworks, government policy remains an important consideration when implementing large-scale energy or grid infrastructure projects.

Looking to the Future

While 2050 is more than two decades away, solar energy use is rapidly expanding worldwide and creating a solar-powered vaccine cold chain in Chad and Sudan will soon be a reality. Given the evidence highlighting refrigeration’s critical role in vaccine distribution, solar power is likely to be prioritized and expanded in the region sooner rather than later.

– Nicole Miller

Nicole is based in Pittsburgh, PA, USA and focuses on Global Health and Politics for The Borgen Project.

Photo: Flickr