If you're unexpectedly in desperate need of blood, one organization may be too desperate to help you. For certain blood types, Stewart Regional Blood Center is either low or has zero units. Their biggest concern: having no units of O negative blood, the type anyone can receive. They're asking for your donations. Call 1-877-Be-A-Gift to make an appointment. That's 1-877-232-4438. You must be at least 17 years old, weigh at least 110 pounds, be in good general health, and you should bring a picture ID.