You've encountered them. They're the people who draw your blood for tests and make it possible for you to donate during potentially live-saving circumstances.

To each other, they may joke about being 'blood suckers' or 'vampires,' but to others they're …

You've encountered them. They're the people who draw your blood for tests and make it possible for you to donate during potentially live-saving circumstances.

To each other, they may joke about being 'blood suckers' or 'vampires,' but to others they're …