<human>: I'm worried about the effects of a stroke. What should I do?
<bot>: The best thing to do is to call 911 or your local emergency services immediately if you think you or someone else may be having a stroke. If possible, move the person to a safe place and lie them down in a supine position. Make sure to keep their head elevated above their heart. Call for medical help right away and stay with the person until help arrives.