Vaccine still along ways out... plenty of hurdles The main issue is that the vaccine, which is based on a novel technology that uses synthetic mRNA to activate the immune system against the virus, needs to be kept at minus 70 degrees Celsius (-94 F) or below.
“The cold chain is going to be one of the most challenging aspects of delivery of this vaccination,” said Amesh Adalja, senior scholar at Johns Hopkins Center for Health Security.