Introduction:
The establishment or occurrence of COVID-19 which is called as chronology of this infectious disease is as this. The foremost cases were known to be reported in December 2019. Commencing from 18th December all the way through 29th December 2019, 5 patients that were infected with this infectious disease were hospitalized in the midst of acute form of the respiratory agony condition furthermore one in those admitted patients died Park,M et al (2020). By January 3, 2020, 40 patients got admitted in the hospital and all of them were identified to be COVID-19 infected patients by the laboratory confirmation and just few of them had co-morbidities like cardiovascular, hypertension, cancer , asthma etc. it was considered that these patients might be infected due to the hospital acquired infections ( NOSOCOMIAL). And it was presumed that this infection might be transmitted from one person to other person through various means like by air droplets, coughing, sneezing, by getting close to an infected person Bulut, C et al (2020). At beginning only patients with symptoms were checked clinically or by the hospitals to be infected but those with asymptomatic but having that infection were also a leading cause of its spread because they did not know that they are infected or not. In January 22, 2020, about 570 cases of this new infection were reported in different a province of China. Coronavirus is a type of viral disease that mainly affects the respiratory system of human. Preceding outbreaks of the coronaviruses (CoVs) embrace (SARS)-CoV the Severe acute respiratory syndrome along with (MERS)-CoV the Middle East respiratory syndrome that have been formerly considered to be the agents as those which have great threat to public health Lipsitch, M et al (2020). In December 2019, a huddle of the people infected with this viral infection got admitted in the hospitals having the preliminary verdict as of pneumonia with an indefinite etiology. The infected individuals were considered as they must be associated towards the seafood as well as damp animal market present in Wuhan, Hubei Province, China, Dong, Y et al (2020). On January 25, 2020, there were about 1975 cases were inveterate to be tainted by means of the COVID-19 within mainland of China and with the increase in mortality rate. After this to other confirmed reports suggested that about 5500 cases were present in China till the end of January, 2020. After this the cases were also reported from other countries too and the infected countries are as follows Thailand, Taiwan Malaysia, Sri Lanka, Vietnam, Nepal, Japan, Cambodia, Singapore, Italy, Republic of Korea, France, and Germany. Due to the emergence of the COVID-19 cases WHO, declared it as pandemic in March19, 2020 McMichael, T et al (2020). Now, the strategies regarding the treatment of infected patients are just supportive because there is no confirmed medicine or vaccine available for this infection. The other ways of reducing its chances to avoid social contact and the self-isolation at home can reduce the chances of its spread and also reduces the mortality rate Zhai, P et al (2020). The virus of COVID-19 has turn out to be the main pathogens of raising the respiratory syndrome outbreaks. There is a large family of the (+ssRNA) single stranded RNA virus with the intention of as it could be secluded in diverse species of animal Xie, J et al (2020). Due to its zoonotic origin it can also spread disease from animals to human when in close contact with each others like those of SARS-COV and MERS-COV. Amusingly, these last viruses have possibly originated as of bats furthermore subsequently stirring into the other mammalian species acting as host for these pathogens Van, W et al (2020).