T lymphocytes, also known as T cells, play a central role in identifying and eliminating alien invaders in the body.
They do this by capturing a cell infected by a virus, bore a hole in its membrane and inject toxic chemicals into the cell. These chemicals then kill both the virus and infected cell and tear them to pieces.
To the surprise of the scientists, the T cell became a prey to the coronavirus in their experiment. They found a unique structure in the virus’s spike protein that appeared to have triggered the fusion of a viral envelope and cell membrane when they came into contact.
The virus’s genes then entered the T cell and took it hostage, disabling its function of protecting humans.
This observation was later confirmed by autopsy examinations on more than 20 patients, whose immune systems were almost completely destroyed, according to mainland media reports.
Doctors who had seen the bodies said the damage to the internal organs was similar to a combination of Sars and Aids.
The gene behind the fusion function in Sars-CoV-2 was not found in other coronaviruses in human or animals.
But some deadly human viruses such as Aids and Ebola have similar sequences, prompting speculation that the novel coronavirus might have been spreading quietly in human societies for a long time before causing this pandemic.