The Corona viruses belong to the β genus. COVID-19 is an acute respiratory infectious disease. Currently, the patients infected by novel corona virus are the main source of infection, asymptomatic infected people can also be an infectious source. Based on the current epidemiological investigation, the incubation periodis 1 to 14 days. The main manifestation includes fever, fatigue and dry cough. Nasal congestion, runny nose, sore throat, myalgia and diarrhea are found in a few cases. Coronavirus are enveloped RNA viruses that are distributed broadly among humans, other mammals, and

birds and that cause respiratory, enteric, hepatic, and neurologic diseases. Seven Coronavirus species are known to cause human disease.

Four viruses - 229E, OC43, NL63, and HKU1 - are prevalent and typically cause common cold symptoms in immuno competent individuals.

The three other strains - severe acute respiratory syndrome Coronavirus (SARS-CoV), Middle East respiratory syndrome Corona virus (MERS-CoV) and 2019 Novel Coronavirus (COVID-19) - are zoonotic in origin and have been linked to sometimes fatal illness .

Covid 19 rapid test kitcan detect pathogen antigens directly from nasopharyngeal swab or or opharyngeal swab specimens.