Cartoonish graphic with four pairs of hands holding blood donation bags; tubing marked with blood type leads to red heart in center

While the FDA rules for blood donation were revised twice in the last decade, one group — men who have sex with men (MSM) — continued to be turned away from donating. Now new, evidence-based FDA rules embraced by the American Red Cross will focus on individual risk rather than groupwide restrictions.

Medical experts consider the new rules safe based on extensive evidence. Let’s review the changes here.

The new blood donation rules: One set of questions

The May 2023 FDA guidelines recommend asking every potential blood donor the same screening questions. These questions ask about behavior that raises risk for HIV, which can be spread through a transfusion.

Blood donation is then allowed, or not, based on personal risk factors for HIV and other blood-borne diseases.

Questions for potential blood donors

Screening questions focus on the risk of recent HIV infection, which is more likely to be missed by routine testing than a longstanding infection.

The screening questions ask everyone — regardless of gender, sex, or sexual orientation — whether in the past three months they have

When is a waiting period recommended before giving blood?

Does a waiting period before giving blood apply in other situations?

Yes:

Who cannot donate blood?

Anyone who has had a confirmed positive test for HIV infection or has taken medicines to treat HIV infection is permanently banned from donating blood. This rule is not new.

Why were previous rules more restrictive?

In 1983, soon after the HIV epidemic began in the US, researchers recognized that blood transfusions could spread the infection from blood donor to recipient. US guidelines banned men who had sex with men from giving blood. A lifetime prohibition was intended to limit the spread of HIV.

At that time, HIV and AIDS were more common in certain groups, not only among MSM, but also among people from Haiti and sub-Saharan Africa, and people with hemophilia. This led to blood donation bans for some of these people, as well.

A lot has changed in the world of HIV in the last several decades, especially the development of highly accurate testing and highly effective prevention and treatment. Still, the rules regarding blood donation were slow to change.

The ban from the 1980s for MSM remained in place until 2015. At that time, rules were changed to allow MSM to donate only if they attested to having had no sex with a man for 12 months. In 2020, the period of sexual abstinence was reduced, this time to three months.

Why are the blood donation guideline changes important?

The bottom line

Science and hard evidence should drive policy regarding blood donation as much as possible. Guidelines should not unnecessarily burden any particular group. These new guidelines represent progress in that regard.

Of course, these changes will be closely monitored to make sure the blood supply remains safe. My guess is that they’ll endure. And it wouldn’t surprise me if there is additional lifting of restrictions in the future.

About the Author

photo of Robert H. Shmerling, MD

Robert H. Shmerling, MD, Senior Faculty Editor, Harvard Health Publishing; Editorial Advisory Board Member, Harvard Health Publishing

Dr. Robert H. Shmerling is the former clinical chief of the division of rheumatology at Beth Israel Deaconess Medical Center (BIDMC), and is a current member of the corresponding faculty in medicine at Harvard Medical School. … See Full Bio View all posts by Robert H. Shmerling, MD

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