24 VACCINES IN PHASE 3 CLINICAL TRIAL: The finish line of the global race draws near. The scientific community is feverishly working to get a vaccine out of accelerated trials, and to make sure they're both safe and effective. As of November 12, 2020, there are 24 vaccines in final Phase-3 clinical trials, based on the WHO “draft landscape of COVID-19 candidate vaccines”. All of them had passed through Phases 1 and 2 stages to test safety and efficacy.