We thank Favalli et al for their interest in our study reporting the course of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) disease 2019 (COVID-19) in a case series of… Click to show full abstract
We thank Favalli et al for their interest in our study reporting the course of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) disease 2019 (COVID-19) in a case series of 17 patients with systemic lupus erythematosus (SLE) under long-term treatment with hydroxychloroquine (HCQ).1 2 As mentioned in our study, we did not aim at reporting the incidence rate and the severity of COVID-19 in SLE, because our cohort most likely over-represents the most symptomatic and severe cases, as a result of a bias in the selection procedure of the patients used by the physicians. Favalli et al , by studying the nasopharyngeal carriage of SARS-CoV-2, confirm the low prevalence of COVID-19 in their cohort …
               
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