Florence Nightingale advocated for significant changes in healthcare, emphasizing the importance of sanitation and nursing education. Her experiences during the Crimean War revealed the dire conditions in military hospitals, prompting her to improve hygiene practices to reduce mortality rates. Nightingale's statistical analyses demonstrated the connection between environmental conditions and health outcomes, leading to reforms in healthcare administration. She founded the first nursing school and advocated for professional standards within the nursing field. Her pioneering work laid the groundwork for modern nursing and healthcare reform, emphasizing the critical role of patient care.