Is the Brain Swelling From Westen Alvirus?

In many brain infections with viruses, the brain swells because of inflammation. And so i'm wondering if that's swelling of the brain. You can imagine it pressing against the limb vessils and sblocking kind of drainage. So then they want to look at whether virus particles go from the c s f to thee crvical lymph notes. Could this be a root of virus getting out of the brain? I don't know why they didn't find vira proteins in the axillary lymph Notes. It's not like these lymp vessels weren't known for many years. But it kind of changes the landscape if virus can get out of thebrain infect elsewhere again, and so forth