In Japan, they suggested that the reason for the discharge of the Delta-strain of coronavirus in the country became its self-destruction. This is stated in the material posted in the Sankei Shimbun newspaper.
Researchers from the University of Niigata in the central part of Japan put forward the theory that too many mutations have accumulated in the genome, which led to a change in the NSP14 key protein, which is responsible for the ability of SARS-COV-2 to correct the existing errors and disadvantages, which in The result led to self-destruction strain.