Can I Donate Blood If I Have a Cold?
Quick Answer
No — do not donate if you have an active cold, flu, fever, or illness. Wait until you have been symptom-free for at least 24–48 hours and feel fully recovered before donating.
Important Eligibility Notice
For specific eligibility questions about your health situation, contact your nearest donor center directly. The information on this page reflects general OBI guidance and FDA standards, but individual circumstances vary.
OK Blood Donor follows FDA guidelines and its own clinical protocols when evaluating donor eligibility. If you arrive for a donation with signs of illness, you will be asked to reschedule — for your safety and the safety of the blood supply.
Why Illness Affects Donation Safety
When you are sick, your immune system is actively fighting an infection. Donating blood when ill can worsen your symptoms and delay your recovery because donation temporarily reduces your circulating blood volume and puts additional strain on your body. Additionally, donor safety is a core requirement — OBI's health screening is designed to protect both you and the patients who depend on donated blood. Blood collected from a donor who is actively ill may also not be suitable for transfusion, making the donation of limited value.
Symptoms That Temporarily Disqualify You
Per general OBI and FDA guidance, the following symptoms will result in a temporary deferral on the day of donation:
- Fever (temperature above 99.5°F / 37.5°C)
- Cold symptoms — runny nose, nasal congestion, sneezing
- Sore throat
- Productive cough
- Active flu symptoms — body aches, chills, headache associated with illness
- Nausea, vomiting, or diarrhea
- Feeling generally unwell or fatigued from illness
Mild, chronic conditions like seasonal allergies (without fever or infection) do not typically disqualify donors. If you have questions about your specific condition, always call your donor center first.
How Long to Wait After a Cold, Flu, or COVID-19
The general guidance from OBI and consistent with FDA standards is:
- Common cold: Wait until symptom-free for at least 24–48 hours and feeling fully recovered.
- Flu: Wait until symptom-free for at least 24–48 hours and fully recovered. If prescribed antivirals, follow your physician's guidance.
- COVID-19: Wait until fully recovered and symptom-free. Contact your nearest OBI donor center for the most current COVID-related eligibility protocol, as guidelines continue to evolve.
- Antibiotics: Generally, you must complete your antibiotic course and be symptom-free before donating. Specific requirements depend on the underlying infection.
These are general guidelines. For specific eligibility questions about your health situation, contact your nearest donor center directly.
What to Do If You Feel Sick on Your Appointment Day
If you wake up on the day of a scheduled donation feeling sick — even mildly — the right action is to call your donor center and reschedule. Donor centers expect this and will not penalize you. Rescheduling protects you, protects other donors and staff at the center, and ensures the blood supply remains safe. Most OK Blood Donor centers can reschedule you quickly once you've recovered. You can also reschedule or book a new appointment online using the scheduling link below.
Feeling well? Schedule your donation today.
Book in 2 minutes online. Walk-ins also welcome at Oklahoma donor centers.