I came across this recent article on T-Cell response to the Covid vaccine this morning, which finds that people with multiple sclerosis on a B-Cell depleting treatment (partly) make up for lack of antibodies by producing more T cells. The twitter account where I found the reference hailed this as "good news for the immunocompromised" more generally, not only those with MS.
I can't pretend to understand all of it but I wonder - would you think this is good news for CLLers too?