Crossroads Between Innate and Adaptive Immunity IVThis volume presents a collection of reviews derived from work presented at the Aegean Conference: 4th Crossroads between innate and adaptive immunity. This meeting was the fourth in a series, and assembled a team of scientists working on mechanisms by which the innate immune system of the host senses pathogens, the cellular and signaling networks that orchestrate the innate response and antigen presentation and adaptive immunity. The importance of