This diagram depicts how the adverse events following immunization reports flow from the origin (vaccine recipient) to the Public Health Agency of Canada. At the top of the diagram is a circle representing the vaccine recipient. From the circle, an arrow points down to a box with the immunization provider and/or health care provider with another arrow pointing from this box down to a box with local public health units. From this box, there is an arrow pointing down to a box with Federal/Provincial/Territorial Immunization Authorities and an arrow pointing to a box with Public Health Agency of Canada (CAEFISS Database). On the left of this flow diagram, is a red box depicting IMPACT with a thick solid arrow pointing from here to the CAEFISS Database box and two dotted arrows pointing from IMPACT to the Federal/Provincial/Territorial Immunization Authorities box and the Local Public Health Units. To the right of the flow diagram is a box titled Market Authorization Holders (MAH) with a dotted line pointing to the CAEFISS Database box.