The Sphere standards were created in 1997 to improve disaster response quality and accountability. They establish minimum standards in four sectors: water/sanitation/hygiene, food/nutrition, shelter/settlements, and health. The health standards aim to prevent excess mortality and morbidity by maintaining crude and under-5 mortality rates below double pre-disaster levels through essential health services. Preparedness is key and includes contingency planning, stockpiling, emergency services, training, and community planning to ensure health facilities remain functional during disasters.