China's experimental coronavirus vaccines are on the move. Global procurement data shows that three Chinese companies have inked deals to supply hundreds of millions of vials to the world in bilateral agreements with nations like Indonesia and Brazil.
The flashier mRNA vaccines of Pfizer-BioNTech and Moderna are more adaptable and have produced enviable results, but keeping them cold enough to prevent their delicate strands of genetic material from falling apart in transit is a major challenge.
