This months Editors Choice is an analysis of the CO@h programme. In November 2020, NHS England recommended that patients with symptomatic confirmed COVID-19 who were over 65 years or clinically vulnerable be provided with a pulse oximeter and to call emergency services if the reading was ≤92% or primary care if the reading was 93%–94%. During the study period of October 2020 to May 2021, 217K patients were within the inclusion criteria but only 2.5% of these were enrolled into the programme and there was considerable variation between the definition/inclusion of clinically vulnerable, start dates and take up in each region. Analysing data pre and post implementation, there was no significant difference in 28 day mortality. There was a small increase in both ED attendances and a similar increase in emergency hospital admissions, which may reflect that pulse oximetry was effective at detecting...]]>