Understanding the human body is a team effort. That's where the Yachtel group comes in.

Researchers at Yachtolt have been delving into the secrets of probiotics for 90 years.

Yachtold also partners with nature portfolio to advance gut microbiome science through the global grants for gut health, an investigator-led research program.

To learn more about Yachtolt, visit yacolp.co.

.jp. That's Y-A-K-U-Lt.c-O.jp. When it comes to a guide for your gut, count on Yacolt.

Hi, and welcome to COVID Quickly, a scientific American podcast series.

This is your fast track update on the COVID pandemic. We bring you up to speed on the science

behind the most urgent questions about the virus and the disease. We demystify the research

and help you understand what it really means.

I'm Tanya Lewis. I'm Josh Fishman. And we're Scientific American Senior Health Editors. Today, we'll

explain the new official methods to determine if you're in a pandemic safe zone or danger area.

Then we'll discuss what other pandemics look like when they were ending and whether this one, at long last, is heading down a similar path.

The map of the U.S. shifted last week, or at least the map of COVID danger did.

Suddenly, a lot of hazardous regions were deemed safer.

What happened, Josh?

Did COVID disappear?

It was a weird moment, Tanya, and no,

COVID hasn't gone away. But last Friday morning, people looked at an official Centers for Disease

Control map showing much of the nation was in a high-risk area. And the next day, that map

showed about 60% of the U.S. was really at low or medium risk, and people in those areas didn't need to

wear a mask anymore, the agency said. What happened was three things. One, now we have more tools

to keep people safer, such as vaccinations and new antiviral drugs. Two, we're seeing fewer infections

...