Dr Mrinalini Dey asks Dr Kathrine Grøn (Copenhagen, Denmark) about her recent paper, which examines infection risk in RA patients treated with abatacept, rituximab and tocilizumab. They discuss the DANBIO cohort, the differences in incidence rates between biologic-naïve patients and switchers, and also consider the results in the context of COVID-19. This paper is the Editor’s Choice for August 2020."