Pfizer, Moderna's coronavirus shot rollouts could freeze up, experts say, citing cold-storage needs

Drugmakers on the hunt for a COVID-19 vaccine have promised massive supply rollouts in the coming months if their candidates pass regulators' scrutiny. But promises and results are very different things: for two highly touted mRNA-based shots, storage concerns could derail those plans.

A pair of frontrunner mRNA-based COVID-19 vaccines from Moderna and Pfizer could run into supply logistics issues over the ultra-cold storage needs for both shots, SVB Leerink analysts said in a pair of client notes Thursday.