covid 19 and immune system
Covid-19 and Immune System

After acquiring COVID-19, individuals blood who infected by the virus mild or had moderate asymptomatic coronavirus, examining after six months scientists found that the blood of these people still had immune cells to recognize the covid virus. As published on news health today on November 17, 2020.

Till now, over 56 million people have been affected by SARS-CoV-2 which causes COVID-19. Reacquiring of infection in peoples with confirmed covid cases is very rare. This study goes against the theory that antibodies against this virus steeply decreased in peoples who mildly or moderately infected by the virus.

The researchers suggest reacquiring the infection from COVID-19 is very rare because of immune cells called T cells, which work over 6 months to protect people against the virus. These T cells remain in the blood for over 6 months and whenever they recognize any covid virus they recruit more immune cells to kill the infected cells or to produce antibodies. 

How Immunity Works against COVID-19.

These findings have made doctors and researchers optimistic about the immunity developed after the infection, but it is still an idea, or we can call it a piece of the puzzle, according to Prof.Paul Moss, who is a specialist at Birmingham University in the department of hematology in the UK.

There are still many things to learn about COVID-19 and how immunity deals with it because there is still not enough evidence that shows or expresses the T cells can protect people from COVID-19, it is not yet reviewed or published a study in any journal but you can read it online at bioRxiv.

Monthly Sampling 

They did this study on 100 individuals who had just recovered from the coronavirus and agreed to be a part of this study from March to April in the year 2020. They had mild or moderate symptoms and did not need to be hospitalized, or they were symptom-free. The participants were between 22 and 65 years old, including 77 females. 

The researchers asked them for blood once a month, which helped researchers to track the antibody levels, their changes by focusing on three viral proteins. 

Even after six months, the helper T cells found in the blood of all participants were responding to the virus. The cells responded to the virus by producing is very important to compete against the infections caused by the virus, this molecule is called an Immune-Signaling molecule.  

The response of the T cell was 50% stronger in those who had symptoms as compared to those who did not experience any corona symptoms. According to the authors of the study, people who infected with symptoms get higher.

Positive Outlook Regarding Vaccinations

This study has given hope about the vaccine to cope with COVID-19, the vaccine works on recreating immune response in those who may come in contact with a virus, the vaccine and provide long-lasting immunity.

This is excellent news: for the development of vaccines and for long-term protection against viral reinfection,  the study found there were many limitations, like the small size and a few males, adults, older and severely sick people.
We can help our T cells by adopting a hygienic lifestyle and healthy diet, increase your immune system by healthy food, and reducing weight if you are obese, and exercise daily.