T cells may help COVID-19 patients — and people never exposed to the virus
How important certain immune cells are for those fighting the coronavirus remains unclear
![T cells](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2020/05/051520_eg_cell-coronavirus_feat.jpg?fit=1028%2C579&ssl=1)
Scientists found certain immune cells that target the coronavirus (seen in this transmission electron micrograph) in the blood of people who had recovered from a coronavirus infection as well as in the blood of some people who had never been exposed to the virus.
NIAID