Old new coronavirus

The main biological characteristics of Coronaviridae viruses, including viruses, severe acute respiratory syndrome and Middle East respiratory syndrome, are presented. The features of immunopathogenesis associated with these infections and their differences from the infection 2019-2020 are analyzed. It is believed that the modern incidence of upper respiratory tract in adults, associated with coronaviruses, is between 10 and 30%. Coronaviruses are ecologically diverse, with the greatest diversity in bats, suggesting that they are the main reservoirs of coronaviruses. Research into the genome of the new coronavirus - 2019-nCoV has shown that it has about 80% nucleotide identity with original viruses of severe acute respiratory syndrome and the ability to bind to angiosine-transforming receptors еnzyme 2. This, along with the high genetic proximity of coronaviruses, indicates their overall origin and overall probable source. However, the receptors of the angiosin-transforming enzyme 2 are the key that gives access to the cell even with low infecting activity. It has been shown that the main diagnostic methods to increase the specificity of detection of a new coronavirus should be variants of polymerase chain reaction and immunoblotting. However, there is still a lot of unknown related to the life of the 2019-nCoV virus. There is a clear identification and comparison of the genomes of the virus in different countries. Identify those genetic inserts that allow the virus to escape from the control of the immune system and turn into a hypervirulent strain. Proving or disprove the possibility of the 2019-nCoV virus is altering its genetic and antigenic potential in different animal species and becoming a new type of virus.