Cover image

ON THE COVER:

A scanning electron microscopic image of HIV. The glycoprotein complex on its surface enables the virus to attach to and fuse with target cells to initiate the infectious cycle.

Image by MedicalRF/Photo Researchers, Inc. Image and text copyright 2012 Photo Researchers, Inc. All Rights Reserved.

See related article:

“Comparing Outcomes of HIV versus Non-HIV Patients Requiring Mechanical Ventilation” pp. 57–64.