Omicron Is Here. Should You Cancel Your Trip?

David Freedman, the president-elect of the American Society of Tropical Medicine and Hygiene, said that the type of mask one wears while traveling is particularly important. Dr. Freedman discourages ...

What We Know About the New Covid Variant, Omicron

Moderna, Pfizer-BioNTech and Johnson & Johnson, makers of vaccines approved for use in the United States, and AstraZeneca, which is widely used in Europe, have all said they were studying Omicron...

Fear and Uncertainty Over the Omicron Variant

To the Editor: Re “New Variant Stirs Fears of Setback; Travel Bans Rise” (front page, Nov. 27): Once again the news — a new variant out of Africa — is proving that until the whole world gets a handle...

South Africa’s Omicron Work Deserves a Prize

South Africa is paying a heavy price for its good deed of telling the world about the Omicron variant of the virus that causes Covid-19. Many countries, including Britain and the United States, are r...

We Got a Head Start on Omicron, So Let’s Not Blow It

There’s very little we know for sure about Omicron, the Covid variant first detected in South Africa that has caused tremors of panic as winter approaches. That’s actually good news. Fast, honest wor...