Why is Corona virus so deadly? Why is so feared? Even powerful countries like the US are covering in fear at the very mention of this contagion. There is no vaccine as yet and the trials to develop a vaccine re still in their infancy. Given the Corona virus’s propensity to mutate, the microbiologists are still at sea to understand its behaviour.
Why is Corona so different from others? Why are older people more susceptible to its attack? Corona virus spreads through the droplets of saliva or phlegm spewed out during sneezing and coughing. For a few days after infection, there is no manifestation and the infected person looks every inch normal. It is only after 14 days that cough, sore throat and inflammation while breathing are manifest. The virus kills the internal tissue and proliferates inside the body. Corona then enters the walls of the internal systems, affects the nervous system, increases the blood pressures and then affects all life supporting systems. One does not know why the human antigens fail to develop a resistance system to the Corona virus. The scientists suspect that an enzyme system called S2 could be responsible for it. Corona affects those using medicines for diabetis and hypertension. This is the reason why most elders get easily affected.
In case of SARS or MERS, the characteristics of the affliction get manifest quickly. In case of Corona, they are not clearly visible and by the time they become manifest, the internal systems get completely damaged and the immune systems are affected. It is because the characteristics are manifest slowly that the infected people infect many more people. Hence, lock down, self-isolation, quarantines and other restrictive practices are so important, say doctors.