The symptoms of this disease are dry cough, fever, difficulty in breathing. So it is very important to maintain a distance of around 1 m (3 ft) away from person who is sick. By touching these droplets present on the surface around the person with COVID-19 is a strong reason for catching this disease. The main spreading way of this virus is through respiratory droplets expelled by the person suffering from cold and cough. The virus of COVID-19 is transmitted through contact with respiratory droplets instead of air. The effect of the virus is an acute lung jury and respiratory distress syndrome that ultimately causes pulmonary failure and causes a fatality. Its size ranging from 65 to 125 nm in diameter. The virus having crown like spikes on the outer surface of it that's why we called as corona virus. The SAR-COV is a member of the β-coronavirus sub-group from coronaviridae family ( Pyrc et al., 2007). Again, this virus has not previously seen in humans so it is also called “Novel corona virus”. This disease is the first time introduce in the year of 2019 that is why it is called COVID-19. In the name of the disease COVID-19, CO stands for ‘Corona’, VI stands for ‘Virus’ D stands for ‘Disease’. World Health Organization gave the name of the disease as COVID-19 on Feb 11 2020. Genetically the virus of COVID-19 and Severe Acute Respiratory Syndrome (SARS) are related to each other but disease caused by them is quite different.
World Health organization (WHO) in named it SARS-COV-2 and the disease as COVID-19 ( Cui et al., 2019 Lai et al., 2020 Peiris et al., 2004 WHO, 2020). A second outbreak was in 2012 in Saudi Arabia as Middle East respiratory syndrome (MERS). 2003 was the first known year of SARS illness caused by coronavirus in China as acute respiratory syndrome.
History provides a record of epidemics such as plague, smallpox, measles, cholera, influenza, Ebola, AIDS, severe acute respiratory syndrome (SARS) and now COVID-19 ( David, 2020). COVID-19 is a new dangerous infectious disease that causes illness in animals or humans.