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Coronaviruses are included in the subfamily Coronavirinae of the family Coronaviridae. Orthocoronavirinae or Coronavirinae are the scientific name of corona virus. The ongoing blazehappening due to the coronavirus SARS coV previously called 2019-nCOV ,started in city named Hubei province of the people’s republic of china which subsequently unrolled to various other countries. The world health organisation emergency committee announced a global health emergency in January 2020 on the grounds of rapid increase in china as well as all the international locations .initially the infection caused high morbidity and mortality in china but the incidence in other nations were low. Coronavirus is characterised by positive single stranded large RNA viruses ,enveloped and can infect humans and also a wide range of animals. According to the reports SARS-coV-2 was transferred from animal to human on sea food in market of Wuhan, China .there is no enough information about the possibility of a intermediate host.
Pneumonia was the first clinical sign that ledto the recognition of SARS CoV 2 related disease COVID 19. Though several other symptom related to covid 19 has being defined, pneumonia is the most severe symptom. All the observations suggest that the range of incubation period is 0-24 days but the mean incubation period is 7days. symptomatic patients the clinical presentation is within 7days with complains of fever,cough,nasal congestion fatigue and other signs of upper respiratory infections which can further turn into symptoms of pneumonia in almost 75%of patients.Most corresponding signs of viral pneumonia include decrement in Oxygen saturation,chest x ray ,blood gas changes, and further imaging modality shows ground glass appearance,patchy consolidations alveoli filled with exudates and interlobular involvement pointing towards deterioration. other common blood picture is lymphopenia and increase in c reactive proteins and proinflammatory cytokines.
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