Following up on my previously asked question, which asks how COVID infects T-cells in immune system.
Here's a study that shows that recovered covid patients have "exausted t-cells". To quote:
T cell counts are reduced significantly in COVID-19 patients, and the surviving T cells appear functionally exhausted. Non-ICU patients, with total T cells, CD8+T cells CD4+T cells counts lower than 800/μL, 300/μL, and 400/μL, respectively, may still require aggressive intervention even in the immediate absence of more severe symptoms due to a high risk for further deterioration in condition.
Is this normal for other coronaviruses (like the common cold)? Also is it possible that this immune damage can be a long-term effect, similar to HIV?