Perspectives COVID-19 in a Sydney nursing home: a case study and lessons learnt Lessons learnt from COVID-19 outbreaks in residential aged care facilities could limit future impacts I nfectious disease outbreaks are a hazard of communal living in places such as military barracks, boarding schools, prisons and residential care homes. The risks are exacerbated when residents are vulnerable because of advanced age, comorbidities and frailty, or there are too few or inadequately trained staff. The home-like setting of modern residential aged care facilities (RACFs), and the overcrowding and limited staffing that are features of many, are not conducive to prevention or control of infectious diseases. 1-3 Early in the coronavirus disease 2019 (COVID-19) pandemic it was clear that age would be a risk factor. 4,5 Internationally, age-stratified case fatality rates (CFRs) have been an estimated three times higher in people aged over 60 years (4.5%) than in those aged under 60 years (1.4%). 6 In Australia, the overall CFR from COVID-19 is about 3%. 7 The majority of deaths have occurred in people over 70 years of age. At 14 September 2020, there were 1995 COVID-19 cases among residents of government-subsidised RACFs, of whom 604 (30%) died. This is in contrast to a CFR of 8.5% (7/82) among recipients of government-subsidised domiciliary aged care services. Residents of RACFs represent 74% (602/816) of all COVID-19 deaths in Australia to date. 7 Comorbidities associated with an increased risk of severe COVID-19, including diabetes, chronic kidney and cardiovascular disease, are more common among RACF residents. 8 Transmission of COVID-19 can spread silently within an RACF from someone with asymptomatic or presymptomatic infection, or atypical symptoms. 9-11 Outbreaks in RACFs, with high attack rates and CFRs, have been reported in many countries. 9,10,12-14