Covid 19, known as the "corona virus", is one of a group of larger viruses called coronaviruses, and it has infected humans for decades "with numerous diseases, most of them in the upper respiratory system," says director of the Research Education Department at Sacred Heart University, Jacqueline Fernarelli.
These viruses were discovered in the sixties of the twentieth century, and they were known to be animal origin, infecting both animals and humans.
"As long as the bats have been a source of dangerous viruses," said Saracen associate professor Sophia Hart, including SARS, MERS and Ebola, but noted that SARS Cove 2 may have originated in another animal. Researchers have discovered a similar virus in animals or cinnamon, nothing is certain yet. .
This corona virus is one of many animal viruses, that is, mutated from animals to humans, in a phenomenon called "flood infection", and these viruses are very common. It is estimated that animals originate from six out of ten known infectious diseases, and the origin of three out of four new infectious diseases .
Covid 19's symptoms range from mild to severe from one person to another: some have little or no symptoms, some suffer from flu-like symptoms, and some require an artificial respirator.