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COVID-19 - A Natural Phenomenon


Covid-19 - A  Natural Phenomenon
Viruses are not living things ; They are complicated assemblies of molecules, including proteins, nucleic acids (DNA & RNA), lipids and carbohydrates ; But on their own they can do nothing unless or until they enter in living cells ; Where they can replicate themselves & mutate in the host cells ;  Viruses are continuously changing as a result of genetic selection ; They undergo subtle genetic changes through mutation and major genetic changes through recombination . Mutation occurs when an error is incorporated in the viral  genome ; Recombination occurs when  co-infecting viruses exchange their genetic information creating a new type i.e. novel virus ;
In prehistoric times human beings were hunter-gatherer ;  Apart from hunting their prey animals, mainly big herbivorous animals, their interaction with the animal world was minimal ; But along with growth of civilization they started domestication of animals, forming dairies, piggeries, poultry farms etc.  In modern times, along with the growth of population explosion, human interaction with animals like pigs, birds(hen etc.) , has reached to an unprecedented degree of concentration in some pockets of the world, depending on the local food  habits, trade etc. Such pockets have become the dens of tremendous viral accumulation/concentration giving rise to a much higher degree of evolutionary pressure upon virus  mutation ;
Again, let us come back to understand the cause of virus mutation in short & very simple words ; We have already seen that viruses are micro infectious organisms which reproduce inside the living cells of the host ; When infected or attacked, the host cell is forced to rapidly produce thousands of original copies of the of the virus and if error occurs during the process, it may be called a biological accident at micro-organic level,  which give  rise to a  new type of virus which again starts its own replication ;  
Viruses, especially those made of RNA can mutate rapidly  to give rise to new types ; Host cells may have little protection against such new forms ; As for example Influenza virus changes often, so a new vaccine is required to combat it each year ; However, under evolutionary pressure,  when there occurs a  major change by mutation, it causes pandemics, as for example Swine Flu which spread  to most countries in 2009 ;  In many cases, viruses infiltrate and mutate in animal host cells, giving rise to the Zoonotic disease ; Such as Coronavirus in Bats and Influenza in pigs & birds, before they are transferred to humans ;
Thus we see, the  present  Novel  Corona Virus  might well be and most likely is a natural phenomenon like Spanish Flu Pandemic in 1918,  Ebola in West Africa in 1976  etc.  These viruses are extremely detrimental & contagious and along  with the growth of  civilization  the possibilities of their  recurrence in new forms again & again could not be  & cannot be avoided altogether ;
However,  this dangerous virus could not  be prevented from rapidly spreading throughout  the 
world  and it is the  only failure on part of the  mankind ;  

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