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In the last six months, people around the world haveInitiated new measures in their lives Try to protect yourself from becoming the next victim of COVID-19. The hand disinfectant flew the shelves of the stores andThe masks are seen On most faces when they are public. As scientists and doctors study every facet of the virus, some positive news emerged. According to a new study, you can already be sure of a serious case of COVID. Why?Because some people - even those who have not yet been exposed to the virus - show signs of pre-existing covidation immunity.

The German study, published in theNature Journal on July 29, examined a sample of 68 healthy people who hadnot yet been exposed to the coronavirus. Of these, 35% had T cells - a form of immune cells - in their blood, which can directly attack the new coronavirus.

These T cells have been thought to be found in people whohave already had COVID-19And the study found these cells in 83% of participants who had the virus. But how did those who have not been infected to get these immune cells? The authors of the study believe that healthy individuals may have generated these T cells during the fight against similar coronavirus infections in the past. And cells can use "cross reactivity" to respond to the new coronavirus.

"This seems in this study that there is a significant proportion of individuals who have this reactive cross-state immunity from other coronavirus infections that may impact the way theyPrice with the new coronavirus, "AMESH ADALJA, MD, Senior Scholar at the Johns Hopkins Health Security Center, told CNN. "I think the big question tries to jump because they have these T cells to understand what could be the role of these T cells."

This is important given to know that the only other great scientific scientificThe hope of immunity so far has been antibodies, which are proteins formed by a different type of immune cells: cells B. Unfortunately, according to many recent studies,Antibodies for Sars-COV-2 seem to be exceptionally fast fading-And can fade asquickly as three weeks, a study by King's College London reported. However, it's not too unusual for coronaviruses, as seas and missing Sars antibodies over time.

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Adalja, who did not participate in the study, told CNN that he believes that the presence of T cells in unexposed persons can also help explain why young adults and children are not oftenExperience serious cases of COVID-19. He says that "a hypothesis" could be pre-existing T cells may be more widespread and active in younger people than those who are older.

"And if you could compare people maybe with a severe and gentle disease and try to look at the T cells of these people and say," People who have a serious illness less likely to have reactive crushed T cells. To people who may have a light disease more crossed cross cells? I think there is a biological plausibility for this hypothesis, "he said. "It is clear that the presence of the T cell does not prevent people from being infected, but does it module the severity of the infection? That's what it seems to be the case." And to fight the disease,This only thing feeds the propagation of coronavirus, say experts.