This evidence synthesis relates to the following policy question posed by the Department of Health to inform the work of the National Immunisation Advisory Committee:

Groups at increased risk of COVID-19 due to crowded living and or working conditions may include Travellers, Roma, international protection applicants, homeless, prisoners and those working in food processing plants. Based on the available national and international evidence in relation to the increased risk of infection with COVID-19, and the increased risk of severe disease from COVID-19 (including hospitalisation, ICU admission and death), is the above list complete and appropriate?