By Subrata Mukherjee
In love with Golapi Subratagolapi
The COVID-19 basically a respiratory disease is sweeping the globe with its extreme force. The virus is also known as SARS (Severe Acute Respiratory Syndrome) that generally lives in bats and jumps to humans through an intermediate host.
According to the World Health Organization there are many diseases earmarked as threats causing epidemic and which have no fool proof preventive measures. These are Ebola, Zika, SARS. They reproduce very quickly and spread through random mutations making a catastrophic versionনতুন পৃথিবী।
About the Virus
COVID-19, a first case of pneumonia was discovered in the province of Wuhan in China in December 2019. The name of the virus is SARS-CoV-2, since it is a variant of the coronavirus that caused SARS in 2003. It is named as the new pathogen causing Severe Acute Respiratory Syndrome-(SARS). COVID-19 is capable of spreading through contact through human-to-human. World Health Organization reported that it spreads through sneezing, coughing and germs left on inanimate objects. Human-to-human transmission is seen between and in the close contacts.
The virus spreads through the nose and mouth predominantly and eyes which can be susceptible the virus. The illness is capable of spreading before the expression of symptoms.
Coronavirus belongs to a family of viruses called Coronaviridae and order Nidovirales, which infect mammals and birds. SARS and SARS-CoV-2 both belong to the same genus Betacoronavirus. They do not infect reptiles and arthropods. Genetic sequencing has confirmed that the new virus has a uniform genome with very limited genetic variation and is similar to the that exists and circulates in bats. Incubation period i.e the entry of the pathogens and the expression of symptoms between 10 to 14 days.
The SARS-CoV-2 virus lives in Chinese horseshoe bats and ramifies as natural hosts and is transmitted through intermediate hosts to humans. According to scientists as they had made it clear from the research the virus has crossed the species barrier from the bats to pangolins to humans and therefore the chain of infection has received its own entry.
It should be noted that civet was confirmed as the intermediate host of SARS as the SARS coronavirus shared 99 percent of genome similarity with the civet coronavirus and with a genetic similarity of more than 96 percent was found in the coronavirus of bats. The bats could not have passed the virus directly to humans as there are differences between the connection of transmission of the two viruses. This means there is an intermediate host.
However, it is not clear yet whether the other animals can be infected with the covid 19 and can be hosts to transmit the virus to the humans.