Laws have reduced ground-level ozone since the 1970s, but scientists warn that rising temperatures will fuel more of the gas and stall pollution reduction.
COVID-19 shutdowns and restrictions halted studies for cancer, diabetes, and more, threatening scientific progress. Can researchers make up for lost time?
Crushing exhaustion, trouble breathing, and more. Doctors describe the disturbing effects of long COVID on their lives and how they're managing to move forward.
The pause of the Johnson & Johnson vaccine after six severe illnesses shows how a federal panel weighs the risks of medical protection that might cause harm.
Patients with intellectual disabilities are six times more likely to die from COVID-19 than other people. An expert weighs in on how we must improve their care.