Study finds lasting immunity after Covid-19 infection

CAPE TOWN- In a recent study, Swedish researchers found that people can develop long-term Covid-19 immunity after infection as T-lymphocytes (T-cells) may have the ability to recognize the virus.

Previous studies found that coronavirus antibodies can fade after approximately three months. However, some of these studies discounted the role of white blood cells, or B cells. 

Memory T-cells form part of the immune system that responds to a foreign invader and informs B cells about how to craft new virus-targeting antibodies. 

The study published in Cell, revealed that SARS-CoV-2-specific T cells will likely prove critical for long-term immune protection against Covid-19. 

Covid-19 positive blood samples from 206 people in Sweden were examined and the authors found that regardless of whether a person was asymptomatic or had recovered from a mild or severe case, they still developed a robust T cell response. 


According to the authors, “memory T cells will likely prove critical for long-term immune protection against Covid-19 and may prevent recurrent episodes of severe Covid-19”. 

At present, there is no vaccine against Covid-19, however, researchers of another study published in Nature said these T-cells may help in the development of a vaccine. 

While these latest findings about T cells and Coronavirus immunity may prove useful in the fight against Covid-19, it remains unclear how long people who recover from the virus will be protected from future infection.


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