Every 2 seconds, someone in the world needs a blood transfusion. An accident victim, a woman giving birth, a cancer patient, a child with severe anaemia — all of them saved by a stranger's donation. 💉 But giving the wrong blood can trigger a deadly immune reaction. Blood transfusion is both a life-saving miracle and a precise science. Knowing who can donate to whom, and why it matters, is essential knowledge for any healthcare-minded student. Avinto will guide you step by step through Subtopic 5.5: Blood Transfusion. 🩸 Type START to learn this life-saving science!