RSV vs. Flu: What's the Difference?

RSV (respiratory syncytial virus) and influenza (flu) are both common respiratory viruses, but they affect people differently and peak in different seasons.

Age patterns: RSV is especially common in infants and young children and can cause wheezing or breathing difficulty. Flu affects all ages but often causes more intense whole-body symptoms in older children and adults.

Symptom overlap: Both can cause fever, cough, congestion, and fatigue. Flu more often starts suddenly with high fever and significant body aches. RSV in young children may look like a cold but can progress to fast breathing or poor feeding.

Testing: A provider may recommend flu or COVID-19 testing based on symptoms and season. RSV is often diagnosed clinically in children based on exam and history.

Treatment: Both are usually viral — antibiotics do not treat them. Care focuses on fluids, fever management, and monitoring breathing. Antivirals may be considered for flu when started early and clinically appropriate.

When to seek care: Consider NeuMed if symptoms are severe, breathing is a concern, fever persists, or you need guidance. Walk in or save your spot online at Houston-area clinics.