Potential conflicts of interest. F. M. and C. d. C. report support from the French Drug Agency (Agence Nationale de Sécurité du Médicament) as external experts in the pharmacovigilance surveillance of monoclonal antibodies used against coronavirus disease 2019, unrelated to research addressed in the current letter. All authors have submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest. Conflicts that the editors consider relevant to the content of the manuscript have been disclosed.