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After its emergence in December 2019 in Wuhan, China, the COVID-19 outbreak has now one of its main epicentres in Lombardy (Italy), with more than 50 000 confirmed cases and 9000 deaths. As rheumatologists operating in the same pandemic area (Milan), we read with great interest the letter published by Monti and colleagues1 about the description of COVID-19 among patients with rheumatic diseases treated with biologic disease-modifying drugs (bDMARDs). Certainly, the quantification of the risk of severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) infection and its evolution towards severe interstitial pneumonia leading to acute respiratory distress syndrome (ARDS) is crucial in such a population of fragile patients. To fill this gap, in the same period of health emergency between 25 February and 2 April 2020, we collected data from patients treated with bDMARDs afferent to the Research Center for Adult and Pediatric Rheumatic Diseases of the ASST Gaetano Pini-CTO in Milan, by using a survey investigating the impact of COVID-19. …