I'm sure she'll still use this time to think about the manga. Even if she can't release a chapter for a while due to her sickness, she'll think about future plotlines, character development, designs etc. She could even be drawing. No qulity stuff but sketches and storyboards could be possible.
"For Feanor was made the mightiest in all parts of body and mind, in valour, in endurance, in beauty, in understanding, in skill, in strength and subtlety alike, of all the Children of Illuvatar, and a bright flame was in him"