But the simplest Google search and you can find Nature articles talking about T-cell response with respect to Covid:
https://www.nature.com/articles/s41586-020-2550-z
https://www.nature.com/articles/s41467-021-24377-1
https://www.nature.com/articles/s41577-020-00436-4
If you aren't aware of these discussions it's not because of lies of omission, gas lighting, or a vast conspiracy theory. It's because you buried your own head and then said someone is holding your head down.