Share this article Share this article PHILADELPHIA, Feb. 1, 2021 /PRNewswire/ -- Someone has a stroke every 40 seconds in the US, resulting in death every 4 minutes. Stroke is the leading cause of disability from a medical condition. When it happens, blood clots or bleeds kill a part of the brain – it goes dark – and can no longer control part of the body. People stop being able to walk, see, talk, or control their hand or arm the way they once did. Although treatments exist, they only work within a short window from the start of a stroke. Rehab can restore some function, but improvements typically plateau in about 6 months.