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TME 63: Why You Shouldn’t Wait for Someone to Call You to Donate Blood

Updated: May 1

Blood donation is one of the most selfless acts a person can do—it saves lives. Yet, many people who are willing to donate blood wait for an emergency call or a desperate plea from a hospital before stepping forward. The harsh reality? By then, it might already be too late.

Here’s why you shouldn’t wait for someone to call you—why you should donate voluntarily and regularly—and how your delay could cost someone their life.


A man sitting at home while ambulance is outside
Image courtesy : AI

Blood Isn’t Used Immediately—It Takes Hours (Even Days) to Process

Many people think: "If there’s an emergency, I’ll donate right then." But here’s the truth:

1. Testing & Processing Takes Time

When you donate blood, it doesn’t go straight to a patient. It undergoes mandatory screening and processing, which can take 6–24 hours (sometimes longer). Here’s what happens:

  • Screening for Infections – Your blood is tested for HIV, Hepatitis B & C, Syphilis, and other diseases.

  • Blood Typing & Cross-Matching – The blood group is confirmed (A, B, AB, O, +/–).

  • Component Separation – Whole blood is split into RBCs, plasma, and platelets, each used for different medical needs.

2. In an Emergency, There’s No Time to Wait

Imagine a car accident victim losing blood rapidly—they can’t wait 6 hours for your blood to be tested. They need it NOW.

If blood isn’t already stocked in the blood bank, the patient may bleed out while waiting.


What If the Patient Has a Rare Blood Type?

1. O Negative: The Universal Donor (But Rare)

  • Only 6.6% of the population has O– blood.

  • It’s the only type that can be given to anyone in emergencies.

  • If an O– patient needs blood and there’s no stock, they could die waiting.

2. Extremely Rare Blood Types (Like Bombay Blood Group)

Some blood types are so rare that only a handful of donors exist in an entire country. If they need blood, they can’t afford to wait for a donor to show up.


What If the Patient Needs More Than 1 Unit?

  • Trauma patients may need 5–10 units of blood in a single surgery.

  • Cancer patients require regular transfusions during chemotherapy.

  • Childbirth complications (like postpartum hemorrhage) can need 3–4 units immediately.

One donation isn’t enough. Hospitals need constant supply to handle multiple emergencies.


A team performing a surgery
Image courtesy: Wix

"I’ll Donate When There’s a Need" – Why This Mindset is Dangerous


  • Blood has a shelf life:

    • Red Blood Cells: 42 days

    • Platelets: Just 5 days

    • Plasma: Up to 1 year (frozen)

If everyone waits for an emergency call, blood banks run empty.


Real-Life Consequences of Waiting:

  • A mother bleeding out after childbirth because no O+ blood was available.

  • A car crash victim dying because the hospital couldn’t find AB– donors in time.

  • A thalassemia patient (who needs blood every month) suffering because of shortages.


The Solution? Donate Regularly (Before You’re Asked)

  • Healthy adults can donate every 3 months (men) / 4 months (women).

  • Just 1 hour of your time can save up to 3 lives.

  • Regular donors = Stable blood supply = Lives saved daily.


Myths That Stop People from Donating:

"It’s painful." → A tiny pinch, over in seconds.

"I’ll feel weak." → Your body replaces blood in 24–48 hours.

"I don’t know my blood type." → They’ll test and tell you!


Final Plea: Don’t Wait Until It’s Too Late

Someone, somewhere, is fighting for their life right now, hoping that your blood is waiting for them in the blood bank.

Don’t wait for a call.

Don’t wait for an emergency.

Donate today—because tomorrow might be too late.


Be the reason someone lives. Donate blood. Regularly.

📅 Find a blood bank near you and schedule your next donation now.


A mother and child
Image courtesy: Wix

Did you know?

  • India alone needs 15 million units of blood annually but collects only 12 million.

  • Every 2 seconds, someone needs blood.

  • 1 in 7 hospital patients requires a transfusion.

Your blood is their lifeline. Don’t make them wait. ❤️🩸


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thirdthinker

Dr. Arun V. J. is a transfusion medicine specialist and healthcare administrator with an MBA in Hospital Administration from BITS Pilani. He leads the Blood Centre at Malabar Medical College. Passionate about simplifying medicine for the public and helping doctors avoid burnout, he writes at ThirdThinker.com on healthcare, productivity, and the role of technology in medicine.

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