Covid-19: Risk of death more than doubled in people who also had flu, English data show

Covid-19: Risk of death more than doubled in people who also had flu, English data show – The BMJ

Original study (preprint): Interactions between SARS-CoV-2 and Influenza and the impact of coinfection on disease severity: A test negative design – medRxiv

Commentary on Twitter

People infected with both flu and SARS-CoV-2 are more than twice as likely to die as someone with the new coronavirus alone, emerging evidence analysed by @PHE_uk has found. The data has been published as a preprint on medRxivhttps://t.co/3Qv3gxGRXB

— The BMJ (@bmj_latest) September 23, 2020