Complete Donor Guidelines · Based on WHO & Clinical Guidelines

Donor Instructions
and Guidelines

Every two seconds someone needs blood. One donation can save up to three lives. Here's everything you need to know — eligibility, preparation, benefits, myths, and more.

450ml
Per donation
24 hrs
Volume restored
3
Lives saved
100M+
Units given yearly
Scroll to explore
A comprehensive Blood Donation Guidelines — following WHO's instructions Go To Main site

WHO Guidelines

Who Can
Donate Blood?

Blood donation is a healthy habit that supports natural blood renewal — the donated volume is compensated within 24 hours, and red cells are fully replaced within several weeks.

🎂

Age

Generally 18 to 65 years. In some countries, 16–17 year-olds may donate with parental consent and if physical criteria are met. Regular donors over 65 may be accepted at a physician's discretion.

18–65 years
⚖️

Weight

You must weigh at least 50 kg. For 350 ml donations, a minimum of 45 kg may be accepted in some countries.

≥ 50 kg
❤️

Health

You must be in good health on donation day — no cold, flu, sore throat, stomach bug, or any active infection. Dental procedures: wait 24 hrs for minor work, 1 month for major.

Good health required
🩸

Haemoglobin

Minimum Hb levels: ≥12 g/dl for females and ≥13 g/dl for males. A finger-prick test is performed on-site before every donation. You will not be allowed to donate if levels fall below the threshold.

Tested on-site
🔁

Frequency

Males may donate every 4 months. Females every 6 months. After pregnancy, defer for as many months as the pregnancy lasted, plus at least 3 months after significant weaning.

Males 4mo · Females 6mo

WHO Special Deferral Criteria

Travel to malaria, dengue, or Zika-endemic areas may cause a temporary deferral. Tattoos or piercings require a 6-month wait (or 12 hours if performed by a registered health professional with no inflammation). Individuals with a positive HIV test or history of injected recreational drug use are permanently deferred. Anyone engaging in at-risk sexual activity in the past 12 months should also defer. Full WHO guidelines →


Instructions

Before & After
Your Donation

Preparing properly ensures your donation is safe, effective, and comfortable — for you and the recipient.

🌙

Before Donating

🍽

Don't donate on an empty stomach. Eat a light meal and wait at least 30 minutes before heading to the centre.

😴

Get a good night's sleep the evening before your donation.

💧

Drink 2 glasses of water before arriving. Good hydration makes veins easier to find and reduces dizziness risk.

🤒

Do not donate if you have fever or are currently taking antibiotics, aspirin, antihistamines, or insulin.

🍷

Avoid alcohol for at least 24 hours prior to donation.

🚬

No smoking for at least 30 minutes before (or after) your donation.

💊

Disclose all medications to the screening staff. Not all medicines disqualify you — staff will assess eligibility individually.

🦷

After a minor dental procedure, wait 24 hours. For major dental work, wait one full month.

☀️

After Donating

🥤

Eat and drink something before leaving the donor area — this is essential, never skip it.

💦

Drink extra fluids for the next 4 hours to help your body recover and replenish plasma volume.

🩹

If there is bleeding at the needle site, raise your arm and apply firm pressure until it stops.

😵

If you feel faint or dizzy, lie down immediately or sit with your head between your knees until it passes.

🏃

Avoid driving, vigorous exercise, or intense physical activity for at least 2–3 hours after donation.

📞

If any symptoms persist, telephone the blood bank or consult a doctor promptly.

🩼

Remove the bandage after 1 hour. Resume all normal activities once you feel fully asymptomatic.

🌙

Avoid iron-rich food restrictions — eat normally and consider iron-rich foods (spinach, lentils, red meat) in the days after.


What to Expect

The Donation
Process

From registration to refreshments, a typical whole-blood donation takes about an hour — the actual blood collection lasts only 8–10 minutes.

01

Registration & Consent

Provide ID and complete a confidential health history questionnaire covering travel, medications, and lifestyle factors.

02

Mini Health Screening

Staff check your blood pressure, pulse, temperature, and haemoglobin via a quick finger-prick test — all free of charge.

03

Blood Collection

A sterile, single-use needle collects approximately 450 ml of whole blood. The actual draw typically takes only 8–10 minutes.

04

Rest & Refreshments

Rest for 10–15 minutes and enjoy provided refreshments. This step is mandatory for your safety — please don't rush away.

05

Lab Testing & Processing

Your blood is screened for HIV, hepatitis B & C, syphilis, and other infections before being separated into components for patients.

06

You've Saved Lives — Thank You!

Each donation can help up to three patients. Whole blood can be refrigerated for up to 35 days if not used immediately.


Science-Backed Benefits

Benefits for
Donors Too

Research increasingly shows that regular blood donation isn't just altruistic — it may offer genuine health advantages for the donor as well.

🫀

Cardiovascular Health

Regular donation lowers blood viscosity and iron stores, reducing oxidative stress on arteries and vessels. One landmark study found regular donors were significantly less likely to suffer a heart attack compared to non-donors.

American Journal of Epidemiology; NYP/Columbia University Medical Center
🧬

Reduced Cancer Risk

Studies suggest that lowering iron stores via donation may reduce the risk of liver, lung, colon, and oesophageal cancers. New research from the Francis Crick Institute also found frequent donors carry genetic mutations less associated with leukaemia.

Journal of the National Cancer Institute; Francis Crick Institute, London (2024)
🩺

Free Health Screening

Every donation includes a complimentary mini-physical: pulse, blood pressure, temperature, and haemoglobin. Your blood is also tested for HIV, hepatitis B & C, and syphilis — offering valuable early detection.

Healthline; American Red Cross
🩸

Blood Cell Renewal

Each donation triggers your bone marrow to generate fresh blood cells, contributing to healthier, more resilient red blood cells over time. This natural renewal process may promote long-term cellular health.

Francis Crick Institute; SunCoast Blood Centers
🧠

Mental Wellbeing

The knowledge that your action will help save lives is a proven mood-booster. Studies link altruistic behaviour to reduced stress — itself a significant risk factor for heart disease and poor immune function.

Kelsey-Seybold Clinic; NYP Health Matters
🔬

Insulin Sensitivity

Emerging evidence suggests that by reducing excess iron stores — high iron is linked to increased diabetes risk in otherwise healthy individuals — regular blood donation may help improve insulin sensitivity.

Journal of the American Medical Association; The Conversation (2026)

Compatibility Guide

Blood Types &
Who You Can Help

Your ABO and Rh blood type determines who you can donate to and receive from. There are over 300 known blood antigens — but the ABO/Rh system is the most clinically critical.

O−
Universal Donor
⭐ Any recipient Most needed
~7% of population
O+
Most Common
All Rh+ types
~38% of population
A−
Rare
A+ A− AB+ AB−
~6% of population
A+
Common
A+ AB+
~34% of population
B−
Rare
B+ B− AB+ AB−
~2% of population
B+
Less Common
B+ AB+
~9% of population
AB−
Universal Plasma
Plasma to all
~1% of population
AB+
Universal Recipient
Receives any type
~3% of population

O Negative — The Most Critical Type

Type O negative is the universal red cell donor type and is given in emergencies before a patient's blood type is known. It is disproportionately in demand but represents only about 7% of the population. The American Red Cross declared an emergency shortage of O negative blood in 2024, with national inventory dropping over 25% in a single month. Find O Negative blood →


Common Misconceptions

Myths & Facts
About Blood Donation

Misinformation prevents many eligible people from donating. Here are the most common myths — and the evidence-based truth behind each one.

MYTH

Donating blood is painful and takes too long.

Fact: The needle prick lasts only a second. The actual blood collection takes 8–10 minutes; the entire visit is about an hour including registration, screening, and rest. Most donors describe the experience as very manageable.

MYTH

You can catch diseases from donating blood.

Fact: It is completely impossible to contract any disease by donating blood. Every needle and collection bag is sterile, single-use, and discarded safely after your donation. There is zero risk of infection for the donor.

MYTH

If you take medication, you cannot donate.

Fact: Many medications do not disqualify you. Eligibility depends on the condition being treated and whether it is well managed. Common medications like birth control, vitamins, and many over-the-counter drugs are perfectly acceptable. Always disclose all medications at screening so staff can assess your eligibility.

MYTH

Donating blood causes anaemia or makes you weak long-term.

Fact: The plasma volume lost is replenished within 24 hours. Red blood cells are fully replaced within several weeks. Donation guidelines are set specifically to ensure your body has adequate time to recover between donations. Most donors feel completely normal within hours.

MYTH

Older adults cannot donate blood.

Fact: In many countries, healthy regular donors over 65 can continue donating at a physician's discretion. There is no universal upper age cut-off for donors who are in good health and meet all other criteria. Age alone is not a disqualifier.

MYTH

Vegetarians or people with lower iron cannot donate.

Fact: Vegetarians can donate provided their haemoglobin levels meet the required threshold. A quick test at the donation centre will determine this. If your levels are too low on the day, staff will advise you on how to boost iron levels before your next attempt.

MYTH

Anyone who has travelled abroad cannot donate.

Fact: Travel does not permanently disqualify you. A temporary deferral may apply if you visited regions with endemic malaria, dengue, Zika, or vCJD risk — but this is time-limited. Blood centres will advise you based on your specific travel history.


The Bigger Picture

The Global
Blood Crisis

Blood donation remains critically undersupplied worldwide. Understanding the scale of need makes every individual donation even more meaningful.

By the Numbers
Sources: WHO Global Database on Blood Safety · American Red Cross · NCBI StatPearls · The Lancet
100M+
Blood units donated globally each year
60
Countries collecting fewer than 10 donations per 1,000 people
40%
Drop in Red Cross donations over the past 20 years
2 sec
How often someone in the US needs a transfusion
35 days
Max refrigerated shelf-life of whole blood
1%
Minimum population that should donate to meet basic needs (WHO target)

Special Donations

Platelet Apheresis
Donors

Platelet donations are especially vital for cancer patients, those undergoing major surgery, and people with clotting disorders. Requirements differ from whole-blood donation.

Eligibility for Platelet Apheresis

Donors must be aged 18–60 years and weigh more than 50 kg. Crucially, donors must not have taken Plavix (clopidogrel) or Ticlid (ticlopidine) in the last 14 days — these antiplatelet medications interfere with platelet function and compromise the effectiveness of the donation.

🎂 Age 18–60 ⚖️ Weight > 50 kg 💊 No Plavix/Ticlid for 14 days ❤️ Good general health 🩸 Adequate platelet count

Ready to Give?

A united blood donation community open to everyone — medical & university students, school & college students, nurses, doctors, teachers, staff, and all local people around Khwaja Yunus Ali Medical College & Hospital. Your generosity takes one hour — its impact lasts a lifetime.

Register as blood donor→
References & Sources
All information on this page is drawn from peer-reviewed research, WHO guidelines, and reputable clinical institutions. Last reviewed: 2025–2026.