Canadian Blood Services says blood donations are needed nationwide as supplies dwindle over the holidays. (CBC / Radio-Canada - image credit)Alisha Openshaw has driven her twin four-year-old sons, Weston and Bennett, to B.C. Alisha Openshaw says her twin sons, Weston and Bennett, receive donated blood and plasma almost weekly for their treatment for acute lymphocytic leukemia at B.C. (Submitted/Alisha Openshaw)According to Canadian Blood Services, more than 11,000 donations are needed between now and Jan. 7, 1,500 of which are required in B.C. "I had never donated blood before the boys," she said.