Respiratory Diseases

RFK Jr.’s Prescription for Bird Flu on Farms: Let It Spread

The health secretary has suggested allowing the virus to spread, so as to identify birds that may be immune. Such an experiment would be disastrous, scientists say.

By Apoorva Mandavilli

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What to Know About Masks and Covid During Late Summer Travel

With U.S. Covid-19 cases at very high levels and new vaccines still several weeks away, we asked experts for their advice on when and where to wear a mask.

By Ceylan Yeginsu and Dani Blum

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Bird Flu Is Spreading. Why Aren’t More People Getting Tested?

Even as the H5N1 virus evolves, gaps remain in the nation’s contingency plans for human testing, scientists say.

By Apoorva Mandavilli

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Farm Animals Are Hauled All Over the Country. So Are Their Pathogens.

Tens of millions of farm animals cross state lines every year, traveling in cramped, stressful conditions that can facilitate the spread of disease.

By Emily Anthes and Linda Qiu