My son donated blood on 12/21/10. Yesterday he received test results on his blood from the American Red Cross. All tests were negative except for the HTLV-I/II Antibody Screen # 1. The HTLV-I/II Antibody Screen # 2 was negative. My son is 20 and is a college sophomore. I m not sure at what age he became sexually active. He claims that he has known his partners and has always used protection. If he were your son,what would you do to protect him? Should we have further blood work done? The American Red Cross Counselors said this was likely a false positive . About 5 days prior to donating blood my son had the flu vaccine. I m just nervous. I feel it must be serious if they are putting him on the deferred list. Please advise this worried mother. Many thanks!!!