It’s been a common catchcry in this current pandemic – whether it be testing, transmission or treatment – ‘we just don’t have enough evidence.’

However in an analysis piece in the BMJ, a group of UK researchers argue that from what we know already about COVID-19 and what we have proven in the past with other pandemic viruses – we can confidently recommend behavioural interventions that we know will reduce community transmission – in particular transmission in households with one affected member.