Just drop her a warm ‘get well soon’ and tell her that you miss her terribly!
Then she might open up and tell you how she feels and what’s stopping her.
All you need is some warmth to show that you care. :) Or, you can write* her a story. A fictional world where she is not sick.
I believe you can pretty much brighten up her day with that, borne wilder.
*I see that you are a top writer in fiction