9 big questions about Omicron explained

Why is the CDC changing its isolation guidance? Which type of test is best? And how long should you isolate or quarantine? Experts weigh in to help clear confusion.

As scientists learn what makes Omicron different from other versions of the SARS-CoV-2 virus, guidance about how to deal with the variant is changing fast. In the U.S., where Omicron is now the dominant variant, the Centers for Disease Control and Prevention have come under fire for their shifting guidelines, including a recently updated recommendation that halves the isolation period for people who test positive from 10 days to five.

What is the science behind the changing guidance, and how can people best protect themselves as Omicron spreads? Here’s what experts say you need to know.

The short answer? Practicality, says Gregory Poland, a vaccinologist and internal medicine specialist at the Mayo Clinic in Rochester, Minnesota. Because Omicron spreads so

DON'T MISS THE REST OF THIS STORY!
Create a free account to continue and get unlimited access to hundreds of Nat Geo articles, plus newsletters.

Create your free account to continue reading

No credit card required. Unlimited access to free content.
Or get a Premium Subscription to access the best of Nat Geo - just $19
SUBSCRIBE

Read This Next

Did this mysterious human relative bury its dead?
This new birth control for cats doesn't require surgery
How the Zoot Suit Riots changed America

Go Further

Subscriber Exclusive Content

Why are people so dang obsessed with Mars?

How viruses shape our world

The era of greyhound racing in the U.S. is coming to an end

See how people have imagined life on Mars through history

See how NASA’s new Mars rover will explore the red planet

Why are people so dang obsessed with Mars?

How viruses shape our world

The era of greyhound racing in the U.S. is coming to an end

See how people have imagined life on Mars through history

See how NASA’s new Mars rover will explore the red planet

Why are people so dang obsessed with Mars?

How viruses shape our world

The era of greyhound racing in the U.S. is coming to an end

See how people have imagined life on Mars through history

See how NASA’s new Mars rover will explore the red planet