Researchers Focus On T Cells In COVID Vaccine Hunt

Reuters reports:

As scientists question whether the presence, or absence, of antibodies to the novel coronavirus can reliably determine immunity, some are looking to a different component of the immune system, known as T cells, for their role in protecting people in the pandemic.

Recent studies show that some recovered patients who tested negative for coronavirus antibodies did develop T cells in response to their COVID-19 infection. Some scientists now say that people who experience a mild illness, or no symptoms at all, from the new coronavirus, may be eliminating the infection through this T cell response.

The findings add to the evidence that an effective COVID-19 vaccine will need to prompt T cells to work in addition to producing antibodies, and may have implications for several treatments in development. They may also shed light on how immunity to new exposure to infection could work.

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