The Claim:
In a video posted online, Dr. Ben Marble says vaccinated people should not donate blood because he believes the COVID-19 vaccine is dangerous, has contaminated the blood supply, and is causing serious health problems like blood clots and heart attacks.
The Facts:
Dr. Ben Marble is a member of a group called America’s Frontline Doctors. He has claimed that Dr. Anthony Fauci created the COVID virus and has promoted treatments such as hydroxychloroquine and ivermectin, which have not been proven to treat COVID.
Marble has not provided evidence that receiving blood from someone who has been vaccinated causes blood clots or heart attacks. A 2025 study that looked back at medical records found that receiving blood from someone who had COVID or received a COVID vaccine does not increase health risks.
Getting a COVID-19 vaccine does not affect a person’s ability to donate blood, platelets, or plasma. The American Red Cross says that people who have been vaccinated can donate as long as they feel well at the time of donation.