Abstract Background Hydroxychloroquine and chloroquine have been used for hospitalized coronavirus disease 2019 patients because of their antiviral and anti-inflammatory function. However. little research has been published on the impact of the immunomodulatory effect of (hydroxy)chloroquine on humoral immunity. Case presentation We report a case of symptomatic severe acute respirator... https://thebrickes.shop/product-category/headboard/