From factory to syringe, the world’s most promising coronavirus vaccine candidates need nonstop sterile refrigeration to work.
But despite great strides in equipping developing countries to maintain the vaccine “cold chain,” nearly 3 billion of the world’s 7.8 billion people live in places with insufficient temperature-controlled storage for an immunisation campaign to bring COVID-19 under control.
The result? Poor people around the world are likely to be the last to emerge from the pandemic.
The cold chain hurdle is just the latest disparity of the pandemic weighted against the poor, who more often live and work in conditions that allow the virus to spread and whose health systems are not equipped for large-scale testing.
Maintaining the cold chain for coronavirus vaccines won’t be easy in the richest of countries, especially when it comes to the handful of candidates that require ultra-cold temperatures of around minus 70 degrees Celsius (minus 94 F).
Logistics experts say most of Africa and much of Southeast Asia, Central Asia and Latin America lack the infrastructure to preserve even more conventional vaccines.
To uphold the cold chain in developing nations, international organisations have overseen the installation of tens of thousands of solar-powered vaccine refrigerators. Keeping temperature-sensitive vaccines safe from beginning to end also requires reliable electricity, sound roads and planning.
For poor countries like Burkina Faso, the best chance for receiving supplies of a coronavirus vaccine is through the Covax initiative, led by the World Health Organisation and the Gavi vaccine alliance.
The goal of Covax is to place orders for multiple promising candidates with the aim of distributing successful ones equitably.
The U.N.’s children’s agency, UNICEF, began laying the groundwork for global distribution months ago in Copenhagen. At the world’s largest humanitarian aid warehouse, logistics staff try to foresee shortages in part by learning from the past, especially the spring chaos surrounding masks and other protective gear that were commandeered off airport tarmacs or stolen for black-market trade.
Cracks in the cold chain start once a vaccine leaves the factory.
Cargo ships are too slow for vaccines with a limited shelf life. Carrying vaccines by air at cold temperatures costs a lot more, and air cargo traffic is only now rebounding from pandemic-related border closures.
Coronavirus vaccines will be one of the world’s most sought-after products, so theft is also a danger.
“They can’t be left on a tarmac and fought over because they would actually be spoiled and they would have no value — or worse still, people would still be trying to distribute them,” said Glyn Hughes, the global head of cargo for the International Air Transport Association.
Gavi and UNICEF have experimented with delivering vaccines by drone. India’s largest cold storage company for food is weighing setting aside space for vaccines.
Multi-dose vials, which are the equivalent of bulk storage for vaccines, reduce manufacturing and transportation costs. But if too few people show up for their jab in time, whatever remains in the vials must be discarded.
For now, UNICEF is betting on 20-dose vials and hoping that the amount wasted will stay below 15% for opened ones, according to Michelle Siedel, one of the agency’s cold chain experts.
UNICEF also expects to have 520 million syringes pre-positioned and maps of where refrigeration needs are greatest by year-end, “to ensure that these supplies arrive in countries by the time the vaccines do,” Executive Director Henrietta Fore said.
If Burkina Faso were given 1 million doses of a coronavirus vaccine today, the country wouldn’t be able to handle it, Jean-Claude Mubalama, UNICEF’s head of health and nutrition for the West African country.
“If we had to vaccinate against the coronavirus now, at this moment, it would be impossible,” he said.
[Sourced from Agencies]