Cancer patients considered to be one of the least population that can be considered lucky during COVID 19 pandemic attributed that to long term treatment with chemotherapy, immunosuppression and multi comorbidities . Women with breast cancer are more likely to get covid-19 infection rather than other type cancers . the co-existing of two diseases breast cancer and Covid19 are very challengeable due to confusion and similarities found in clinical biomarkers to evaluate both diseases as ferritin, D dimers and C-reactive protein and all other immune response and cytokine storm syndrome especially including interleukin-6 (IL-6) . using chemotherapy or any other cytotoxic drugs may exacerbate the severity of COVID -19 infection as well as poor clinical outcomes and even death are expected . The anti-human IL-6R monoclonal antibody (Tocilizumab) was used first in China in patients with severe COVID-19 and patients improved in different clinical outcome . In cancer patients particularly the issue is debatable about the benefits of receiving Tocilizumab.~Clinical studies are going on such medication role in treatment of patients with severe covid 19 infection however, studies have not clearly addressed the role of Tocilizumab breast cancer patient compared to non-cancer patients. This study aims to measure different clinical outcomes after using Tocilizumab in sever covid 19 infection in breast cancer patients vs. non cancer patients
To compare evaluating Clinical outcomes for patients treated with with or without breast cancer patients comorbidity for sever COVID-19 infection in breast cancer patients versus non cancer patients and evaluating Tocilizumab efficacy versus traditional therapy