Save lives and make new friends at the Stanford Blood Center's Spring Picnic Blood Drive & Community Mixer! Sandwiches and salads will be served in a festive atmosphere. You'll feel good knowing you've given a local patient the gift of life, too! Must be free of cold and flu symptoms for 48 hours to donate, and weigh at least 110 pounds. Drink plenty of fluids and eat within six hours prior to donation. Photo I.D. required.