Coronavirus: Scientists call for caution after study suggests warm weather reduces severity of Covid-19

Scientists have called for caution over a new study that suggests the severity of Covid-19 may be reduced during the warmer months of the year, and that dry indoor air may encourage its spread. Researchers from King’s College London analysed data from 6,914 patients admitted to hospital with Covid-19 in Croatia, Spain, Italy, Finland, Poland, Germany, the UK and China. They mapped this against local temperature and estimated indoor humidity and found that severe outcomes – being taken to hospital, admittance to ICU or the need for ventilation – dropped in most European countries over the course of the pandemic, covering the transition from winter to early summer.