Thanks for asking. Kate developed severe asthma, to the point where she was taking prednisone every day and started carrying a portable breathing machine. Eventually she succumbed to her illness.

Her many friends, including myself, miss her dearly, but her memory lives on in all of us.

(Usually I would not share this kind of personal medical information in public, but Kate passed on nearly 50 years ago, and I didn't reveal her last name, so I think it's OK.)