Science

C.D.C. Panel Recommends Third Dose of Covid Vaccine for Immunocompromised

A day after the F.D.A. authorized third doses of the Pfizer-BioNTech and Moderna vaccines for some immunocompromised people, an independent expert panel advising the C.D.C. recommended the move.

Where Dark Skies Draw Star-Gazers, Wildfire Smoke Spoils the View

Parts of the Mountain West still largely free of light pollution or cloudy weather are losing their famed spectacular views of the night sky to smoke from fires burning hundreds of miles upwind.

Amid Extreme Weather, a Shift Among Republicans on Climate Change

Many Republicans in Congress no longer deny that Earth is heating because of fossil fuel emissions. But they say abandoning oil, gas and coal will harm the economy.

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The Next Chapter in Times Newsletters

A new portfolio from Opinion and the newsroom will expand our ambitions in an age-old medium.

Iran’s Health System ‘Beyond Disastrous’ From Covid Surge

The Delta variant of the coronavirus has overwhelmed the country, which has been reeling from the pandemic since it began, presenting a stark test for its new hard-line president.

As Virus Cases Surge, Biden Administration Encourages More Use of Antibody Treatments

A top White House adviser said monoclonal antibody treatments, sometimes underused, could still be crucial in helping people with Covid-19 avoid getting very sick.

Are Delta Symptoms Different?

We asked experts to describe the most prevalent symptoms they’re seeing right now among people with Covid-19.

F.D.A. Approves GHB, a ‘Date Rape’ Drug, for Rare Sleeping Disorder

Jazz Pharmaceuticals brought in more than $1.7 billion last year selling GHB to narcolepsy patients. With the new approval, sales could soar.

What We Think We Know About Metabolism May Be Wrong

A new study challenges assumptions about energy expenditure by people, including the idea that metabolism slows at middle age.

Why Not Just Tell Everyone to Wear Masks?

The C.D.C.’s advice about masking up again was not easy to parse. Some experts think simpler would have been better.