Abstract

The COVID-19 is a new contagious viral/immunological systemic disorder with predominantly respiratory features caused by human infection with SARS-CoV-2. From the time the virus enters the body to the time of initial symptoms of the disease, it is called the incubation period which ranges from one day to fourteen days. Initial presentation in the patients with mild COVID-19 is including mild fever, dry cough, fatigue and then body ache, anosmia, and lack of taste. About 40% of patients with COVID-19 are asymptomatic and, 40%; mild, 15%; severe, and 5% are critical COVID-19. A negative SARS-CoV-2 test does not rule out the diagnosis of COVID-19 and that a positive test does not necessarily indicate a COVID-19 diagnosis. The normal lungs in HRCT scan with a negative SARS-CoV-2 test does not preclude that the person has COVID-19. Patients may contract COVID-19 without any risk factors and have no symptoms. The authors conclude that to reject or confirm the diagnosis of COVID-19 by performing a SARS-CoV-2 kit test and the HRCT scanning of lungs may not be the gold standard for diagnosis of COVID-19. In other words, history is the key to COVID-19 diagnosis. Therefore, in this article, twenty cases of COVID-19 are presented, in most of which the diagnostic test of SARS-CoV-2 and HRCT scan of the lungs are negative.

Keywords: SARS-CoV-2 test; COVID-19; HRCT scan of lungs