Two years into the covid-19 pandemic, footage from isolation centres in Shanghai showing unrest have raised questions about the safety, utility, and appropriate use of such facilities. 1 Confining people infected with a pathogen in a dedicated facility is not a new idea, nor are debates about the ethical basis or how such policies should be implemented while also safeguarding human rights. 2 3 Historical examples of isolation include patients with tuberculosis, those with influenza in the 1918 pandemic, and typhoid carriers. The use of isolation to limit community spread of infectious diseases has not, however, been consigned to history. Isolation facilities were used in the 2003 severe acute respiratory syndrome (SARS) outbreak, and, on a larger scale, Ebola treatment centres were extensively used in West Africa in 2014-15 to break the chains of Ebola transmission. 4 Governments revisited the idea of isolation facilities in response to covid-19 (box 1), especially in the early stages of the pandemic before vaccines became available, when predominant viral strains were less infectious and generally present in settings with low transmission. 6 One abiding image from early 2020 was the construction of massive health facilities in Wuhan, China, to house, treat and isolate people with covid-19 during the first wave. Other countries followed suit by refurbishing hospitals, re-purposing existing large-scale facilities or expanding capacity at pre-existing purpose-built infectious disease facilities (table 1).
Box 1: Isolation facilities for covid-19An isolation facility is a dedicated place where people who test positive for covid-19 receive essential care and are provided with daily necessities, such as food, safe drinking water, and toiletries, as they recover. 5 "Mandatory" isolation means that everyone who meets certain criteria-typically a positive test within a defined period, even if asymptomatic or with mild clinical symptoms that do not require hospital admission-must be confined until they meet the criteria for discharge, are referred to other facilities, or die. This is different from quarantine (which isolates, temporarily, those considered at risk of spreading infection but not known to be infected), but both functions might sometimes be combined, as in New Zealand with its facilities for "managed isolation and quarantine."