A leukopak collects concentrated white blood cells via apheresis — and researchers pay top dollar for them.
A leukopak in plain language.
A leukopak (short for "leukocyte pack") is a concentrated collection of your white blood cells — far more than what a standard blood draw captures.
Instead of drawing a tube of blood and discarding most of it, an apheresis machine continuously draws your blood, separates the white blood cells, and returns everything else (red cells, plasma, platelets) back to your body.
The result: a dense, concentrated sample of your immune cells — T-cells, B-cells, NK cells, monocytes — in quantities that standard draws can't match. This is exactly what makes leukopaks so valuable to researchers.
White blood cells are the currency of immunology research.
Your white blood cells are the front line of your immune system. T-cells, B-cells, and NK (natural killer) cells are exactly what researchers need to develop the next generation of medicine.
Leukopak specimens are used in:
CAR-T therapy development — Engineering a patient's own immune cells to fight cancer. This technology is rewriting how we treat blood cancers, and it requires massive quantities of white blood cells to develop.
Cancer immunology — Understanding how tumors evade the immune system and developing drugs that restore the body's ability to fight back.
Autoimmune research — Studying why the immune system attacks the body's own tissues in conditions like lupus, MS, and rheumatoid arthritis.
Vaccine development — Testing how immune cells respond to new vaccine candidates before they enter clinical trials.
A single leukopak can provide enough cells for an entire research program. That's why researchers are willing to pay $400–$650 per donation.
Four steps from screening to payment.
Leukopak eligibility depends on your health profile and cell count.
Autoimmune, cancer, HIV donors are in highest demand. Your disease-state immune cells are exactly what many studies need.
Healthy volunteers with high white blood cell counts also qualify. Your cells serve as controls for disease research.
Must be 18+ years old and weigh at least 110 lbs. Standard safety requirements for apheresis.
Your screening blood draw determines if your white blood cell count is sufficient. Not everyone qualifies on the first try.
Sign up in minutes. Your screening blood draw tells us if you're a match for the highest-paying research donations.
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