https://www.scmp.com/news/china/society/article/3079443/coronavirus-could-target-immune-system-targeting-protectiveThe article talks about how T cells that touch COVID-19 viruses are taken hostage by the virus (but that new viruses aren't produced from the T cells).
Comparisons to HIV are made, as they both impact the immune system.
There is some confusion as to how some people are asymptomatic, and about cytokine storms.
SARS did not have this same impact on the immune system.