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T cells fight COVID for 6 months after infection




November 5, 2020-A Adult research Those who tested positive for the coronavirus were found to have cellular or “T cell” immunity to the virus six months after infection. This is a discovery that may guide vaccine development.

According to a news release from the British Coronavirus Immunology Consortium, researchers surveyed 100 healthcare professionals who tested positive for COVID-19 in March or April. None of the health care workers needed to be hospitalized.

Researchers collected serum samples from participants each month to measure antibodies. Six months later, they collected blood samples to measure T cell levels-

A type of white blood cell that is part of the immune system. They help the antibody fight many types of infections, not just the coronavirus.

According to a news release, “T cell responses were present in all individuals 6 months after SARS-CoV-2 infection.” “This shows that strong cell memory against the virus lasts for at least 6 months.”

In contrast, antibodies do not appear to adhere that long. A recently published UK study of 365,000 people found evidence that coronavirus antibodies were reduced over a three-month period.

Scientists say that T cell findings can affect how vaccines are developed.

“This is promising news. If a natural viral infection can elicit a strong T cell response, this could mean that the vaccine could do the same,” said the Medical Research Council. Executive Chair Professor Fionawat said.

“Cell-mediated immunity is a complex but potentially very important part of the COVID-19 puzzle, and it is important to do more research in this area. However, the initial results are T cell responses. Shows that can last longer than the initial antibody response, which can have a significant impact on COVID vaccine development and immunological research, “said Shamez Ladhani, a British public health services consultant epidemiologist. I am.

Another important finding in T cell research was that symptomatic individuals had an approximately 50% greater T cell response than asymptomatic individuals.

Professor Paul Moss, head of the British Coronavirus Immunology Consortium at the University of Birmingham, said: “We now need more research to find out if symptomatic individuals are better protected from reinfection in the future.”

Researchers conducted a study to address the ongoing question of a pandemic: does infection provide some kind of immunity to reinfection? So far, there is no definitive answer.


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