Hi, I'm Wendy Zuckerman and you're listening to Science Versus from Gimlet.

This is the show that pits facts against.

Finally, some light at the end of the tunnel.

A sign of hope in a year that's been built with doubt and desperation.

There's been some very exciting news about a vaccine on the horizon.

Pfizer announced that their coronavirus vaccine is more than 90% effective.

Now it's showing it's 95% effective.

We're hearing that clinical trials have been super successful and it's all go go go go go.

People in the UK can start getting the Pfizer vaccine early next week.

The first Americans could be vaccinated against COVID-19 as soon as December 11th.

But before we pop the champagne.

Happy vaccine day.

There's been some questions about these vaccines like AstraZeneca's.

These are thousands of people who got the wrong dosage that in itself is a huge problem.

So what do we know about how well these vaccines really work?

And can we trust that they're safe despite being churned out at warp speed?

That's one thing we're finding out today.

Plus, we're finally getting answers about why some super healthy people land in the hospital

or stay sick for months and months after getting COVID.

These so called long haulers living at nightmare every day.

So what is going on here?

While a lot of us have been sitting at home on our butts watching that chess show on Netflix,

...