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Enough T cells in the blood? According to researchers, those who have had a corona cold are less likely to contract Covid

2022-01-25T10:09:47.473Z

Enough T cells in the blood? According to researchers, those who have had a corona cold are less likely to contract Covid Created: 2022-01-25Updated: 2022-01-25 10:56 am By: Juliane Gutmann Cough, runny nose and fever can speak for Covid-19. But other corona viruses are also in circulation that trigger cold symptoms. © Hendrik Schmidt/dpa The family of corona viruses is large, cold corona viru



Enough T cells in the blood?

According to researchers, those who have had a corona cold are less likely to contract Covid

Created: 2022-01-25Updated: 2022-01-25 10:56 am

By: Juliane Gutmann

Cough, runny nose and fever can speak for Covid-19.

But other corona viruses are also in circulation that trigger cold symptoms.

© Hendrik Schmidt/dpa

The family of corona viruses is large, cold corona viruses have been circulating in our regions for many years.

According to researchers, anyone who has had contact with them benefits.

Colds that have gone through protect against Covid-19 if they are triggered by certain viruses: British scientists came to this conclusion as early as 2020.

Keyword cross-immunity*

. Doctors speak of this when antibodies in the body offer protection against two diseases. A research team led by Kevin Ng from the Francis Crick Institute in London observed the development of such antibodies in the case of coronavirus-related colds. The researchers were able to observe that cross-immunity between Covid-19 and coronavirus-related colds can develop in the cellular immune response and also in the area of ​​antibodies.

For their study result, which was published on the specialist portal "Science", the researchers analyzed around 300 blood samples that came from before the corona pandemic.

They had examined these for antibodies that could bind to Sars-CoV-2.

And indeed, some blood samples contained antibodies that inhibited the Covid 19 trigger Sars-CoV-2

.

The scientists' summary: Infection with common cold coronaviruses offers protection against severe corona courses*.

Background: There are countless types of corona viruses that occur worldwide and cause different diseases: "The family of corona viruses includes a whole range of different pathogens. (...)

About a third of the typical "colds" are caused by this largest of the They cause

RNA viruses

and also one or the other "diarrhea"," informs the Helmholtz Center for Infection Research.

Also read:

Blood group AB as a corona "super receiver", 0 as a virus blocker?

Thesis causes a stir

The more specific T cells, the lower the risk of corona infection

A new publication even concludes that previous infection with cold coronaviruses can protect against infection with Sars-CoV-2.

People with a higher number of T-cells after infection with common cold coronaviruses have a lower risk of contracting Sars-CoV-2

According to a statement from Imperial College London.

"While previous studies have shown that T-cells induced by other coronaviruses can recognize Sars-CoV-2, the new study examines for the first time how the presence of these T-cells at the time of Sars-CoV-2 exposure influences whether someone becomes infected,” the study at Imperial College London is presented.

This would have provided the first evidence of a protective role for T cells against infection with Sars-CoV-2.

However, the study is not representative. Only 52 people participated. They lived with a person who had a Sars-CoV-2 infection detected by a PCR test. Participants underwent PCR testing at baseline, four days, and seven days later to determine if they had developed an infection. The statement from Imperial College London also states

that a comparison of blood samples enabled the researchers to analyze the amount of pre-existing T cells caused by previous infections with the common cold coronavirus and which also contain Sars-CoV-2 proteins virus can detect

. T cells, also called T lymphocytes, are white blood cells that make up part of the adaptive immune system.

Here you can learn more about the innate and the acquired immune system.

Do not rely on the protective effect of a corona cold, but get vaccinated

dr

Rhia Kundu, first author of the Imperial National Heart & Lung Institute study, says: "Exposure to the Sars-CoV-2 virus does not always lead to infection and we were keen to understand why.

We found that high numbers of pre-existing T cells, which the body makes when infected with other human coronaviruses such as the common cold, can protect against COVID-19 infection

."

However, she emphasizes that you should not rely on this alone.

The best protection against Covid-19 is still full vaccination, including a booster shot, according to Kundu.

(jg) *Merkur.de is an offer from IPPEN.MEDIA.

Source: merkur

All life articles on 2022-01-25

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