"Ibrutinib and possibly other BTK-inhibitors may therefore provide protection against lung injury, and even improve pulmonary function in hypoxic patients with COVID-19 as we observed in this series of WM patients on ibrutinib. These findings should be considered as hypothesis generating and preliminary in nature. Patients on ibrutinib, and possibly other BTK-inhibitors may well benefit with continuation of their therapy despite the diagnosis of COVID-19. It will be important to further validate these findings in other patient populations on BTK-inhibitors, including CLL patients. Clinical trials examining the benefit of BTK-inhibitors are being initiated by us and others in COVID-19 patients in pulmonary distress, and the outcome of these prospective, randomized studies will be needed to confirm these preliminary observations. "
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