An update of coronavirus disease 2019 (COVID-19): an essential brief

During 2019, the number of patients suffering from cough, fever and reduction of WBC's count increased. At the beginning, this mysterious illness was called "fever with unknown origin" but now, it is known as the 2019 novel coronavirus (2019-nCoV) or the severe acute respiratory syndrome corona virus 2 (SARS-CoV-2). The SARS-CoV-2 is one member of great family of coronaviruses. Coronaviruses are enveloped positive-stranded RNA viruses. The SARS-CoV-2 has some particular structures for infecting, reproducing and causing damage. The SARS-CoV-2 can bind angiotensin-converting enzyme 2 (ACE-2) receptors and cause various difficulties for human. The SARS-CoV-2 can cause both serious and not-serious issues for mankind. Malayan pangolin and bat are the most suspicious candidate for being sources of the SARS-CoV-2. The SARS-CoV-2 can be transmitted by various ways such as transmitting from infected human to healthy human and can make severe pneumonia, which can lead to death. The SARS-CoV-2 can infect different kind of people with different ages, races, and social and economic levels. The SARS-CoV-2 infection can cause various sorts of clinical manifestations like cough and fever and intensity of signs and symptoms depends on sufferer conditions. Clinicians use all of available documents and tests for diagnosing new cases and curing patients with high accuracy. At the present time, there is no particular way for treating SARS-CoV-2 infection. It seems that the best way for standing against the SARS-CoV-2 infection is preventing from it by social distancing and vaccination. This review tries to prepare an essential brief update about SARS-CoV-2 infection.