Herpes simplex virus, the causative agent of fever blisters. Thin section of virions as they leave the nucleus of an infected cell. Herpes simplex virus infection becomes latent, that is it becomes invisible after a fever blister episode, but the virus persists, in ganglia at the floor of the brain; when conditions are right the virus can re-emerge. Magnification approximately x40,000.

Micrograph from F. A. Murphy, University of Texas Medical Branch, Galveston, Texas.

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Herpes simplex virus, the same image as above, but colorized. Thin section of virions as they leave the nucleus of an infected cell. Herpes simplex virus infection becomes latent, that is it becomes invisible after a fever blister episode, but the virus persists, in ganglia at the floor of the brain; when conditions are right the virus can re-emerge. Magnification approximately x40,000.

Micrograph from F. A. Murphy, University of Texas Medical Branch, Galveston, Texas

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