Categories for Deferrals


June 12, 2017 at 7:17 am
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During the Medical History part of your donation process, the Historian will take a small blood sample from your finger to test your hemoglobin, which is the oxygen-carrying molecule in your red blood cells. In order to get an accurate...

MSM (12-Month Deferral)

June 11, 2017 at 7:38 am
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The FDA requires all blood centers to question donors about activities that are associated with an increased risk of exposure to infectious agents. According to statistics from the public health service, men who have sex with men (MSM) continue to...


June 10, 2017 at 7:46 am
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You will no longer be deferred for tattoos obtained in a California State regulated entity. You will still be deferred for 12 months if you obtained a tattoo outside of California or in California in a non-regulated entity. Your tattoo...


June 9, 2017 at 5:16 am
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Certain medications that are perfectly safe for you to take could be harmful if transfused into another person. Please refer to the medication deferral list for a list of medications that may affect your eligibility as a blood donor. The deferral...


June 8, 2017 at 5:16 am
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Anyone who has ever lived in or visited another country may have different deferral periods – this will all be reviewed in the donor screening process. Below are a few examples of common travel deferrals. If you have questions about...

Zika Virus

June 7, 2017 at 7:25 am
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Stanford Blood Center screens blood collections for Zika virus. However, if you have been diagnosed with having Zika virus infection within the last 120 days (~4 months), please call our Post Donation Callback line immediately at 650-725-9968 and someone will contact you to discuss your previous donations and your eligibility to donate.

Emerging Infectious Diseases

June 6, 2017 at 5:15 am
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Please do not donate if you have EVER had Ebola virus infection or disease. Please do not donate for 4 weeks after full recovery if you have been diagnosed with an infection of chikungunya or dengue. If you have been...