The prognosis (chance of recovery). The patient's preferences in regard to the risks and benefits of treatment. The patient's ability to perform activities of daily living. The type of primary cancer.

For permission requests, please contact NEJM Reprints at [email protected] Select the format you want to export the citation of this publication.

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 ...