- Myth: I can’t donate if I have tattoos.
- Myth: I can’t donate if I got a piercing recently.
- Myth: I can’t donate if I’ve just been to the dentist.
- Myth: Blood can be manufactured.
- Myth: Blood donation is painful.
- Myth: Blood is only needed in times of emergency.
- Myth: Donating blood causes my body to start over producing blood cells.
- Myth: Donating blood makes you gain weight.
- Myth: Donating blood takes a long time.
- Myth: Donating blood will impact my ability to do my daily activities.
- Myth: Giving blood will harm me by taking away red cells or platelets that my body needs to function.
- Myth: I can catch an infectious disease by donating blood.
- Myth: I have a common blood type, so you don’t need my blood.
- Myth: Donating blood can harm my immune system.
- Myth: Other people are already giving enough blood.
- Myth: Vegetarians or vegans cannot donate blood.
- Myth: I cannot donate blood because I have diabetes.
- Myth: I can’t donate if I’ve had low hemoglobin (iron) levels in the past.
- Myth: I must make an appointment to donate blood.
- Myth: I should fast before I donate.
- Myth: I can’t donate blood when I’m on my menstrual cycle.
- Myth: Sometimes, needles and other materials are reused.
- Myth: I can’t donate blood because phlebotomists won’t be able to find my veins.
- Who can give blood?
- Where does my blood go?
- Which patients use what blood components?
- What types of photo ID are accepted?
- What tests are performed on blood?
- What is vCJD?
- What happens when somebody tests positive for an infectious disease marker?
- What can I eat to raise my hemoglobin levels?
- Is it safe to receive blood transfusions?
- I don’t have sickle cell anemia, but I carry the trait. Can I still donate blood?
- How will I feel after I donate blood?
- How often can I donate blood?
- How much blood is taken?
- How long does it take?
- Can I donate blood for myself?
- When was Carter BloodCare founded?
- Can people with high blood pressure donate blood?
- Can people who have tested positive for HIV or AIDS donate blood?
- Can gay or bi-sexual men donate blood?
- What is Apheresis?
- How long can blood be stored?
- Are children allowed to accompany a donor to the donation location? Can I bring children with me when I donate?
- Can I donate if I have a physical disability and may need assistance?
O positive
Medically reviewed on September 9, 2024.
39% of the population
O positive blood has no A or B antigens, and is thus O blood. The positive (+) means that the Rh antigen is present.
O positive blood is very important as a (mostly) universal red blood cell type. This blood type can be used in emergency situations such as traumatic bleeding or other types of emergency transfusions. It is also an important blood type as type “O” patients can only receive type “O” red blood cell transfusions. It cannot be used in all situations as it does have the Rh antigen present – but it is becoming more widely used in emergency situations and is often one of the most needed red blood cell donations. O positive donors are encouraged to donate whole blood and apheresis red blood cells.