June 14 was World Blood Donor Day. Every summer, 10-year-old Aditya's parents face a tough time trying to arrange two units of 'A negative' blood for their thalassemia-afflicted son as the student community, who constitute a major chunk of donors, goes on vacation. Most of Delhi's blood banks face a shortage particularly from April to August, as many of these rely on student donors. As schools and colleges shut for summer vacation, there is a sharp fall in blood donation camps during summer. The blood banks run out of blood and its components, right from the month of April till August,