Computerised Infectious Disease Reporting (CIDR) system

CIDR is the information system developed to manage the surveillance and control of notifiable infectious diseases in Ireland. Case-based data on laboratory and clinical notifications are collected on CIDR, which includes:  Vaccine-preventable diseases,  Respiratory (including COVID-19) and direct contact diseases,  Infectious intestinal diseases,  Vector borne and zoonotic diseases,  Blood borne and sexually transmitted infections and  Healthcare associated infections. Enhanced surveillance data (additional detailed data) are also collected on many of the infectious diseases. Summary data on infectious disease outbreaks are also collected in CIDR and individual cases notified on CIDR and associated with an outbreak are linked to the outbreak. The full list of notifiable diseases can be found at www.hpsc.ie. The current list is also specified in S.I. No. 258/2022 - Infectious Diseases (Amendment) Regulations 2022, available at https://www.irishstatutebook.ie/eli/2022/si/258/ **Purpose:** CIDR is used for the statutory surveillance of notifiable infectious diseases in Ireland (including COVID-19) in order to provide the best possible information for the control and prevention of infectious diseases. The objectives of CIDR include: 1. To monitor trends 2. To detect changes in disease occurrence e.g. identify outbreaks and new pathogens 3. To describe the current burden and epidemiology of disease 4. To determine risk factors for the disease and populations at greatest risk 5. To **Coverage:** National. 1988-present (varies depending on when the disease became notifiable and case-base reporting implemented). 1988-July 2000 – aggregate data July 2000 onwards – case-based reporting implemented in Ireland 2004 - Outbreak data included 2004-2010 – CIDR pilot and go-live implementation (excl