Person putting sunblock on their arm indoors.

Why I wear sunblock indoors

In a column for the Washington Post, a doctor writes about how sun exposure, even while you’re inside a car or next to a big window with sun shining in, can still be dangerous. So wearing sunscreen even on days when you’re mostly inside is not a crazy idea. “Unless you’re in a box—in a box with no windows—you should still be wearing sunscreen on a daily basis,” said Temitayo Ogunleye, MD, a professor of Dermatology, who did not write the column. “You’re still getting a decent amount of cumulative UVA exposure.”

Semaglutide cuts calories even as appetite benefits fade

Semaglutide helped people eat substantially fewer calories for more than a year, even as some feelings of hunger gradually returned. In a 60‑week study, led by Jena Shaw Tronieri, PhD, a senior research investigator at the Center for Weight and Eating Disorders, participants taking semaglutide consistently consumed 24 to 30 percent fewer calories and lost about 15 percent of their body weight, compared with 3 percent in the placebo group. The findings show that long‑term appetite sensations may partially return, but the medication continues to support reduced calorie intake and sustained weight loss.

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Local health systems tighten precautions as measles cases continue to rise

Lancaster County has reported 84 measles cases in 2026, ranking ninth nationally for measles cases in a single county or region, according to state health officials. As the outbreak continues, local health systems, including Penn Medicine Lancaster General Health, have strengthened screening and access precautions, with LG Health asking unvaccinated, non-immune individuals who have measles symptoms to call ahead before entering certain facilities.

mRNA cancer vaccines: Promising but dogged by misinformation

Researchers at Penn and elsewhere are working to develop mRNA vaccines to prevent cancer, and the initial work is promising, experts said. But at this pivotal moment when support and funding are needed most, some policymakers and members of the public are opposed to mRNA technology due to misinformation and disinformation. “Science and data are not being used to make decisions, and we are losing the truth,” said Drew Weissman, MD, PhD, the Roberts Family Professor in Vaccine Research.

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