Lymphocyte Traffic and Homing
Illustrated description of how leukocytes recirculate and emigrate into lymphatic tissue during the immune responses. Includes links to references and chemotaxis. Maintained by Art Anderson, M.D.

Inflammation: The Leukocyte Adhesion Cascade
A detailed look at its various stages. Maintained by the University of Virginia.

Immune-Monitoring.de
A discussion-based site which features new methods in immune monitoring and topics on intensive care medicine relating to immunology and immune monitoring.