Viscerotropic Disease Associated with Yellow Fever: Case Studies. Guide for Participant

The purpose of the following case studies is to familiarize participants with case definitions and with the epidemiological investigation of viscerotropic disease (VTD) associated with vaccination against yellow fever. We present here a cluster of events supposedly attributable to vaccination or immunization (ESAVIs) that occurred in Peru in 2007, during a yellow fever vaccination campaign implemented in a non-endemic area.