COVID-19 is primarily a viral respiratory illness caused by SARS-CoV-2, that has posed a serious threat to world health. Most patients who contract this virus typically develop pneumonia. Based on the broad clinical manifestations associated with multi-organ involvement, COVID-19 is now considered as a systemic disease. It  typically affects the respiratory, cardiovascular, and hematopoietic systems. In addition, to a lesser extent, the neuropsychiatric, renal and endocrine systems are also involved. The immediate complications of COVID-19 are well defined and often associated with increased mortality. However,   long-term complications of COVID-19 are increasingly associated with morbidity.    
This work aimed to describe the etiology, epidemiology, clinical features and complications of COVID-19. In addition; it summarized the latest available treatments for COVID-19 infection.