Moderna vaccine found 94.5% effective at preventing Covid-19

Moderna Inc. said its Covid-19 vaccine was 94.5% effective in a preliminary analysis of a large late-stage clinical trial, another sign that a fast-paced hunt by scientists and pharmaceutical companies is paying off with potent new tools that could help control a worsening pandemic.
 

The highly positive readout comes just a week after a similar shot developed by Pfizer Inc. and BioNTech SE was found to be more than 90% effective in an interim analysis. Both shots rely on a technology called messenger RNA that has never been used to build an approved vaccine. Soon, millions of people around the