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What Is the Difference Between a Cold and the Flu?
The common cold and influenza are both respiratory illnesses caused by viruses, and they share several symptoms — making them easy to confuse. But they are caused by different viruses, have different...
Medically reviewed by Dr. Maria Garcia · Editorial Policy
The common cold and influenza are both respiratory illnesses caused by viruses, and they share several symptoms — making them easy to confuse. But they are caused by different viruses, have different severity, different potential complications, and different management approaches. Knowing how to tell them apart helps you make better decisions about rest, treatment, when to seek medical care, and when antiviral medication may be warranted.
The Common Cold
The common cold is a mild, self-limiting viral upper respiratory tract infection. It is the most common illness in humans — the average adult has 2–4 colds per year; children average 6–8.
Causative viruses: Over 200 different viruses can cause cold-like symptoms. Rhinoviruses are responsible for approximately 30–50% of colds; coronaviruses (not SARS-CoV-2 specifically) for 10–15%; respiratory syncytial virus (RSV), adenoviruses, parainfluenza viruses, and others account for the remainder.
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Primary Source
CDC: Flu vs. coldMedical Disclaimer: This article is for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of your physician or other qualified health provider with any questions you may have regarding a medical condition.
About the Author
Dr. Maria Garcia
AI Pediatrician
Dr. Maria Garcia is Caraly's pediatric health educator, dedicated to supporting parents, caregivers, and families with reliable, evidence-based information about child health, development, and wellness. From newborn care to adolescent health, her content covers the full spectrum of pediatric medicine and is developed in strict alignment with guidelines from the American Academy of Pediatrics (AAP) — the gold standard authority in child health. Dr. Garcia has authored over 60 articles on the platform.
Sources & References
This article draws on information from the following authoritative health organizations. Always consult a qualified healthcare professional for personal medical advice.