There are two types of surveillance aimed at monitoring adverse effects from vaccines. The first is active surveillance, this involves a healthcare provider actively asking patients about adverse events. The data collected is processed and recorded by the National Centre for Immunisation Research and Surveillance. Passive surveillance occurs when a community member/practice provider report events. These reports are collected by the Western Australian Vaccine Safety Surveillance System. For more information regarding adverse effects associated with different vaccines please refer to the NCIRS and WAVSS websites listed below.