Why Parents Worry About RSV
RSV (respiratory syncytial virus) has gotten a lot of attention in recent years, and for good reason. While it causes a mild cold in most older children and adults, it can be serious in very young babies. Here is how to tell when RSV is a "ride it out" situation and when it needs medical attention.
What Is RSV?
RSV is a very common respiratory virus that nearly every child gets by age 2. In older kids and adults, it looks like a regular cold. But in babies, especially those under 6 months, it can cause bronchiolitis — an infection of the tiny airways in the lungs that makes breathing difficult.
Symptoms of RSV
RSV symptoms typically appear 4-6 days after exposure and progress over several days:
- Early symptoms (Days 1-3): Runny nose, sneezing, mild cough, low-grade fever
- Peak symptoms (Days 3-5): Worsening cough, wheezing, rapid or difficult breathing, decreased appetite
- Recovery (Days 5-14): Gradual improvement, though cough may linger for weeks
Warning Signs That Need Immediate Attention
- Fast breathing — More than 60 breaths per minute in an infant
- Retractions — Skin pulling in between ribs or at the base of the throat
- Nasal flaring — Nostrils opening wide with each breath
- Grunting with each breath
- Blue or gray color around lips
- Refusing to feed or taking less than half of normal feedings
- Fewer wet diapers than usual
- Pauses in breathing (apnea) — especially in premature babies
What Parents Can Do at Home
- Nasal suctioning: Use a bulb syringe or NoseFrida to clear mucus before feedings and sleep
- Saline drops: Loosen thick mucus with saline nasal drops before suctioning
- Hydration: Offer frequent, smaller feedings. Dehydration is a key concern.
- Elevate the head: Slightly elevate the head of the crib mattress (place a towel under the mattress, not loose items in the crib)
- Cool-mist humidifier: Adds moisture to help with congestion
- Fever management: Use acetaminophen for babies 2+ months or ibuprofen for 6+ months
Prevention
- Nirsevimab (Beyfortus) — An antibody injection recommended for all infants entering their first RSV season
- Maternal RSV vaccine — Available for pregnant women at 32-36 weeks to protect newborns
- Handwashing — The most effective prevention for the whole family
- Avoid sick contacts — Limit exposure during RSV season (fall through spring)
- Don't smoke around your baby — Secondhand smoke increases RSV severity
Key Takeaways
- Almost every child gets RSV by age 2 — most recover like a cold
- Babies under 6 months and premature infants are at highest risk
- Watch breathing, not just the cough — fast breathing and retractions need immediate care
- New immunizations (Beyfortus) can help protect your baby
- When in doubt, call your pediatrician
