A vaccine for Covid-19 could come faster than previous vaccines, but it could still be a year or more before one is widely available. CNN's Chief Medical Correspondent Dr. Sanjay Gupta talks to a clinical trial participant and explains why this vaccine search is breaking barriers but will still take time.
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Jul 2020
Why a Vaccine Won't Create Instant Immunity
An effective vaccine is seen as the world’s greatest hope for achieving some kind of return to normal, and the timeline for developing one has been sped up dramatically. But as hard as it’s going to be to make a vaccine quickly, once we do, we’ll have a new problem: Getting it to ... Show More
12m 36s
Sep 2020
What We Can't Know About a Vaccine
The race for a COVID-19 vaccine entered a new phase recently. Four different vaccine candidates, developed by Moderna, Pfizer, BionTech and Johnson & Johnson, entered final-stage trials, with two others close behind. But we won’t know exactly how these four vaccines work for mont ... Show More
13m 57s