Proceedings of the National Academy of Sciences

Medical research

Scientists discover hidden army of lung flu fighters

Scientists have long thought of the fluid-filled sac around our lungs merely as a cushion from external damage. Turns out, it also houses potent virus-eating cells that rush into the lungs during flu infections.

Radiology & Imaging

Targeted MRI detects chronic liver disease

Chronic liver diseases such as hepatitis, liver cirrhosis, and hepatocellular carcinoma are a major cause of morbidity and mortality worldwide. Fibrosis—the thickening and scarring of connective tissue—plays a major role ...

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