The cold supply chain can’t reach everywhere – that’s a big problem for equitable COVID-19 vaccination

The Pfizer and Moderna vaccines are a great start that should be celebrated, but they rely on a complicated supply chain of freezers and temperature-controlled shipping methods called the “cold chain.” That reliance on the cold chain raises equity and social justice concerns, since many parts of the world cannot support one. Researchers are working hard on vaccines that can avoid the logistical and economic nightmare of cold chain delivery.