European Cooperation in Science and Technology (COST) Mar 13 2025 Stroke can come out of the blue, even in people who have been healthy all their lives. Unlike some other health conditions that develop gradually, a stroke occurs suddenly when blood flow to the brain is blocked in a cerebral artery, causing the brain to essentially stop functioning almost immediately. What's remarkable about stroke treatment is its extreme time sensitivity. If a blockage is removed quickly, the brain can often