What did Florence Nightingale do after she retired?

After retiring, Florence Nightingale continued to influence the field of nursing and public health through her writing and advocacy. She published several influential works, including "Notes on Nursing," which laid the foundation for modern nursing practices. Nightingale also focused on health reform, particularly in sanitation and hospital design, and she remained active in various social causes, including women's rights. Despite her declining health, she maintained correspondence with leaders in medicine and public health, advocating for improvements in healthcare systems.