Blood donation - Mayo Clinic
https://www.mayoclinic.org/tests-procedures/blood-donation/about/pac-20385144
WebNov 30, 2023 · Blood donation is safe. New, sterile disposable equipment is used for each donor, so there's no risk of getting a bloodborne infection by donating blood. Most healthy adults can donate a pint (about half a liter) safely, without health risks. Within a few days of a blood donation, your body replaces the lost fluids.
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