Discover the global ranking of blood types by rarity, what your type means for donations and health, and why rare blood like O- and AB- is critically needed in emergencies and surgeries.

Discover Rh-null (golden blood), the world's rarest blood type affecting only ~50 people. Learn about Bombay phenotype, why rarity matters for transfusions, and how to donate rare blood.

Comprehensive guide to blood type A positive: health risks, diet science vs fads, donation superpowers, medication quirks, and myth debunking. Learn how A+ affects your health.