You know the timeline we've been quoted every time a COVID-19 vaccine is discussed: 12-18 months. But how accurate is that? What if we get lucky? What if we really, really don't?

When you see news of a new vaccine entering a trial, how should you react? What percentage of vaccines that enter trials actually end up working? And if we do find a vaccine, how can we possibly make enough for more than seven billion people, and get it to them across the world?

GUEST: Robert Van Exan

We love feedback at The Big Story, as well as suggestions for future episodes. You can find us:

Through email at [email protected] 

Or @thebigstory.bsky.social on Bluesky