Thank you for reading.

What I mean is that the SARS-CoV-2 has known tropism for endothelial cells. That means that it directly infects the cells that form the inner lining of blood vessels. That also means that it is nearly certain that even after viral replication has stopped, viral proteins will persist in those cells for some time, making them targets of an antigen specific T-cell response.

I hope my explanation helps you.