Cases show that contact with people with corona has acquired immunity to the virus

A recent study shows that approximately three quarters of people in a family may develop a silent immunity to the emerging coronavirus when one of them is infected.

Scientists found that 6 out of 8 people living with someone who had been infected with the emerging coronavirus showed negative results when testing for antibodies to coronaviruses in their blood, according to the British newspaper "Daily Mail".

But when experts searched their blood samples for T-cell immunity, part of the body’s deep defenses to infection, from white blood cells in the bone marrow, they found that they actually had Covid-19 with mild symptoms.

Immunologists say that the immune system of some patients appears to be divided due to their response to the virus so that those who do not have antibodies in the blood interact at a deeper level with the response of T cells. This raises the possibility of new tests on coronaviruses that detect T cells in a manner similar to tuberculosis tests - with the possibility that a laboratory can treat hundreds of patients and obtain effective results within two days.

It is currently estimated that up to 10 percent of people may have immunity to the virus, based on blood antibody tests, which detect the antibodies generated by blood cells B.
T cells are the body's large weapon that comes out of cells White blood in the bone marrow to kill viruses when the immune system needs more help

While the most recent study from the University Hospital Strasbourg in France looked at seven families, and the researcher "Samira Fafe" said: "Our results indicate that epidemiological data that rely only on detection of SARS-CoV-2 antibodies may lead to a significant reduction in exposure." For the virus. "

The study includes a small sample that is still to be reviewed, but immunologists are looking closely at it, and Professor "Danny Altman" of the Royal College and the British Society of Immunology said that there is growing evidence that Covid-19 immunity appears unusual, because some people show Immunity from T cells alone.

He explained that the natural response to the virus is that antibodies in the blood from B cells are also present, meaning that large numbers of people who have mild symptoms may interact differently with the virus that leaves them silently safe, because they cannot be diagnosed with Covid-19. Through current tests.