Didier Barrera, 17, a senior at Sonoma Valley High School, donated blood for the second time last week at school. At right is Kris Kneeland, 18, also a senior, who is donating blood for the ninth time. Donor Tech Araceli Magana was tending to the students. The bloodmobile comes to the high school three times a year and they get anywhere from 20 to 40 blood donors each time.
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