High levels of T cells from common colds are useful for people in avoiding COVID-19 infection, according to a new peer-reviewed study released by researchers at Imperial College London.
T cells are a type of white blood cell that plays an essential role in protecting the body from infection.
Researchers said the findings might lead to the development of new vaccines, which could provide longer-lasting immunity as well as boost protection against present and future Coronavirus variants, such as Omicron and Delta.
“We found that high levels of pre-existing T cells, created by the body when infected with other human coronaviruses like the common cold, can protect against COVID-19 infection,” said the study author, Dr. Rhia Kundu.
Using blood samples from 52 people within six days, this study explored the levels of T cells that have been induced by previous common cold COVID infections but also cross-recognized COVID proteins in those who had been exposed to the virus, as well as those who had not.
This study’s results showed that the 26 people who did not contract COVID-19 had higher levels of cross-reactive T cells, whereas those who were already positive for COVID-19 had lower levels of T cells.
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