Aug 13, 2020
6 min read
How — and When — We’ll Know If a Covid-19 Vaccine Is Working
Phase 3 trials explained
There are more than 150 experimental Covid-19 vaccines in development right now, and a handful of those have recently entered the final stages of human testing.
Initial findings show a glimmer of promise: In early trials, these vaccines appear safe and seem to spur an immune response in the…
