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.

Yacold 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 yawcult.co.

.jp. That's Y-A-K-U-L-T.C-O.J-P. When it comes to a guide for your gut, count on Yacolt.

Hi, this is Your Health Quickly, a Scientific American podcast series.

We bring you the latest vital health news, discoveries that affect your body and your mind.

And we break down the medical research to help you stay healthy.

I'm Tonya Lewis.

I'm Josh Fishman.

We're Scientific American Senior Health Editors.

Today we're doing a follow-up episode on the best ways to use home COVID antigen tests.

This time, we're looking at whether you get more accurate results if you swab your throat as well as your nose.

We'll also talk about the new CDC guidelines about how long to isolate if you're positive.

It's February, and COVID levels are still quite high in the U.S.

They're way above what the CDC describes as epidemic levels,

which means that a lot of people are sick, including me, as it turns out,

though I may just have a bad cold.

Oh, man, that's rough. It seems like I'm constantly hearing about a friend or coworker testing

positive for COVID, and that means a lot of people are taking home tests. Last month, you and I

talked about a frustrating wrinkle in those test results. Yeah, People who got symptoms and tested right away were getting negative results,

even though they were actually infected. And that seems to be because your immune system

...