London-Sana
A new British study revealed that people who get a negative result in the Corona virus test despite being exposed to the virus have an “immune memory.”
And the Guardian newspaper reported that the study conducted by scientists from University College London showed that some individuals get rid of the virus quickly due to the strong immune response from T cells in the body, which means that the tests record negative results.
The researchers indicated that a percentage of people suffer from a failed infection in which the virus enters the body, but it is cleared by T cells in the immune system at an early stage, which means that the polymerase chain reaction (PCR) and antibody tests record a negative result.
The researchers noted that this discovery could pave the way for a new generation of vaccines that target the T-cell response and that can produce longer-lasting immunity.
All existing corona vaccines focus on preparing antibodies against the vital spike protein that helps corona enter the cells. These antibodies provide protection against severe complications, but the immunity diminishes over time, while the response of T cells does not tend to fade as quickly, which means that the vaccine that targets this area Likely to protect against new strains.
