Recent research has shown that severe cases of COVID-19 show an excessive immune response and a strong cytokine storm, which may include high levels of granulocyte-macrophage colony-stimulating factor (GSF) and interleukin-6 (IL-6). Following up on that research, investigators from China reported the first case of COVID-19 in a patient with multiple myeloma (MM) who was successfully treated with the humanized anti–IL-6 receptor antibody tocilizumab (an off-label use in the United States)

Read more here