Two Harvard doctors offer some guiding principles.

An attempt at a more thorough accounting of the deadliest air disaster in history.

Objective To take advantage of the arbitrarily timed increase in firearm and ammunition availability brought on by the start of deer hunting seasons to study its impact on hunting, and importantly, no...

The shingles vaccine may have a protective effect against dementia, write doctors Christopher Worsham and Anupam Jena.

Using unique natural experiments that avoid common biases, Pascal Geldsetzer and his team found that shingles vaccination has a large protective effect for dementia. The first study from his group was published in Nature in April 2025: https://doi.org/10.1038/s41586-025-08800-x. His team is now trying to raise funds from private foundations and philanthropy to conclusively test this link in a randomized clinical trial. They want to trial a version of the old live-attenuated shingles vaccine, which is no longer being manufactured. If you are interested in helping to fund this effort, please reach out to pgeldsetzer@stanford.edu This video was directed by Stanford's Global Health Media Innovation Lab. Animation by Janine Van Schoor (janinevanschoor@gmail.com). Sound design by Misha Seeff @mishaseeff

"An adversarial collaboration on vaccines could serve as a model," write Drs. Christopher M. Worsham and Anupam B. Jena.

To the Editor Duan et al presented results of an important quasi-experimental analysis1 of the impact of Medicare’s competitive bidding program (CBP) for oxygen supplies on Medicare beneficiaries with...

"What could explain this mortality puzzle?" write Dr. Christopher Worsham and Dr. Anupam Jena.

This cohort study aims to quantify the association between telemedicine adoption and low-value testing among fee-for-service Medicare beneficiaries.

This cross-sectional study compares all-cause and cause-specific mortality rates among physicians, health care workers, and non–health care workers by sex, race, and ethnicity.

Discussing the tradeoffs in public-health decisions might help us make better choices, write Dr. Christopher Worsham and Dr. Anupam Jena.

The blinding light display in “National Lampoon’s Christmas Vacation” dazzled the Griswolds and nearly broke the power grid. What would it cost, and how much power would it really need?

Objective To analyze mortality attributed to Alzheimer’s disease among taxi drivers and ambulance drivers, occupations that demand frequent spatial and navigational processing, compared with other occ...