Inclusion Criteria:  the patient has a recent mild or moderate COVID-19 with no or low-grade fever 99.5- 100.94 °F (37.5-38.3 °C). Mild COVID-19 included that the patient has symptoms of acute upper respiratory tract infection (fever, cough, myalgia, runny nose, fatigue, sore throat, sneezing) or gastrointestinal symptoms (nausea, vomiting, abdominal pain, diarrhea). Moderate grade of COVID 19 included that the participant has pneumonia (cough, frequent fever) with no obvious hypoxemia, the presence of lesions on chest CT  Exclusion Criteria:  that patient was not hospitalized and has moderate or high-grade fever <100.94 °F (<38.3 °C) or other chronic diseases such as heart problems, hypertension or diabetes. Women how were using contraceptives were excluded due to contraceptives decrease immune functions and might affect the subjectivity to autoimmune disorders with marked increases in risk for various autoimmune disorders