Weigh at least 110 pounds.

Are in good physical health.

Are at least 17 years old (there is no upper age limit).

Have not given blood in the past eight weeks (56 days).

Have had hepatitis (not including childhood exposure).

Are pregnant.

Have ever tested positive for HIV, have engaged in high risk behavior, or have had intimate contact with anyone at risk for AIDS.

Have Babesiosis or Chagas Disease.

Have the flu, a sore throat or fever.

Are taking antibiotics for an infection.

Received a tattoo, had your ears or another body part pierced, or experienced an accidental "needle stick" injury in the past 12 months.

Have had heart problems.

Received a blood transfusion in the past 12 months.

Have been recently vaccinated (time of deferral varies). Flu shots do not disqualify you from donating.

Have had a history of cancer (other than skin cancer).

Lived in or traveled to a malaria area.

Have recently had a sexually transmitted disease or mononucleosis.