RSV in Children: Symptoms, Home Care & When to Seek Help (2026)

RSV is the leading cause of infant hospitalization in the US. Here's exactly what to watch for, how to care for a sick child at home, and when breathing changes mean it's time for the ER.

By Symptom Advisory Editorial Team — last reviewed August 18, 2026 — 13 min read

Key Takeaways

• RSV (respiratory syncytial virus) infects nearly every child by age 2 and causes 58,000–80,000 US hospitalizations in children under 5 each year.
• Most healthy children recover at home in 1–2 weeks; the danger is bronchiolitis, which inflames the small airways of infants.
• Watch breathing rate, nostril flaring, chest retractions, and feeding — not just fever — to gauge severity.
• Nirsevimab (Beyfortus) is a 2023-approved long-acting antibody that protects infants for an entire RSV season; uptake more than halves hospitalizations.
• Pregnant adults can receive the maternal RSV vaccine (Abrysvo) at 32–36 weeks to protect newborns.
• Antibiotics do not work for RSV — it's a virus.
• Babies under 6 months, premature infants, and children with heart or lung disease are highest risk.
• Call 911 for blue lips, stopping breathing, or grunting with each breath.

What RSV is and why it matters

Respiratory syncytial virus (RSV) is a common respiratory virus that almost every child catches before age 2. In healthy older kids and adults, it looks like a bad cold. In babies, especially those under 6 months, it can inflame the tiny airways (bronchiolitis) and cause breathing trouble that needs hospital care.

The CDC estimates RSV causes:

• 58,000–80,000 hospitalizations in US children under 5 every year
• 100–300 deaths in young children annually
• Far more cases than seasonal flu in this age group

The 2025–2026 season is the third with both maternal RSV vaccination and infant nirsevimab widely available — a combination that has cut infant hospitalization rates by an estimated 60% where uptake is high.

The typical RSV course

Symptoms peak between days 3–5. If a baby is going to need the hospital, it usually happens in this window — so monitor closely during these days.

Symptoms by age group

Infants under 6 months (highest risk)

• Decreased feeding (less than half normal volume)
• Breathing faster than 60/min
• Nostril flaring with each breath
• Pulling in between ribs (retractions)
• Brief pauses in breathing (apnea)
• Irritability or unusual lethargy
• Fewer wet diapers

Toddlers and preschoolers

• Heavy nasal congestion
• Wet, productive cough
• Wheezing
• Mild fever (often < 102°F)
• Decreased activity

School-age and adults

• Looks like a heavy head cold
• Sore throat, cough, fatigue
• Usually no breathing distress

How to count breaths and spot trouble

The most reliable home measurement is respiratory rate when the child is calm:

Count for a full 60 seconds — short counts are unreliable. Combine with these signs:

• Retractions: skin pulling in below the ribs, between ribs, or above the collarbone
• Nasal flaring: nostrils widening with each breath
• Grunting: a soft "uhh" sound at the end of each exhale
• Head bobbing in infants
• Color change: pale, gray, or blue around the mouth or fingertips

Any of those = call your pediatrician now or go to the ER.

Home care that actually works

For mild RSV, supportive care is the entire treatment. There is no antiviral approved for routine RSV in children.

Do these

• Saline nasal drops + bulb suction before each feed and before sleep — clears the airway when babies can't blow their nose
• Cool-mist humidifier in the bedroom
• Frequent small feeds — easier than full meals
• Acetaminophen for fever > 102°F if uncomfortable (after 2 months) or ibuprofen (after 6 months)
• Upright positioning when awake; standard back-sleep when asleep
• Hand washing to protect siblings

Don't do these

• No over-the-counter cough/cold medicines under age 6 — FDA warns against them
• No antibiotics (they don't treat viruses; only your doctor decides if a bacterial complication develops)
• No honey under age 1 (botulism risk)
• No steam from a hot shower or bathroom — burn risk and limited benefit
• No essential oil rubs on infants

Prevention: the 2026 toolkit

Nirsevimab (Beyfortus) for infants

• Single intramuscular shot
• Protects newborns and high-risk toddlers for an entire RSV season
• ~75% reduction in hospitalization in real-world data
• Recommended for all babies under 8 months entering their first RSV season

Maternal RSV vaccine (Abrysvo)

• Given at 32–36 weeks of pregnancy
• Antibodies cross the placenta and protect baby for ~6 months
• Mom or baby gets one — not both

Universal hygiene

• Hand washing for 20 seconds
• Avoid sick contacts during peak season (Oct–Mar)
• Disinfect high-touch surfaces — RSV survives on hard surfaces for hours
• Keep newborns out of crowded indoor spaces in early winter

When to call the pediatrician

Within 24 hours if:

• Fever in any infant under 3 months (always)
• Fever > 102°F lasting > 3 days
• Cough or runny nose lasting > 10 days
• Refusing feeds for 8+ hours
• Fewer than 4 wet diapers in 24 hours

Red flags — go to the ER or call 911

• Blue or gray lips, tongue, fingertips
• Pauses in breathing > 10 seconds
• Grunting with each breath
• Severe chest retractions
• Unable to wake or unusually limp
• Dehydration: no wet diaper for 8+ hours, sunken soft spot, no tears when crying
• Fever in infant < 3 months (always ER for evaluation)

Hospital treatment

If admitted, your child may receive:

• Oxygen via nasal cannula or high-flow
• Suction to clear airways
• IV fluids if too breathless to feed
• Continuous monitoring
• Rarely: CPAP or ventilator support in PICU

Most hospitalized children go home in 2–3 days.

Glossary

• Bronchiolitis: inflammation of the small airways, the main RSV complication in babies
• Retractions: chest skin pulling in with each breath, a sign of breathing effort
• Apnea: pause in breathing > 10 seconds, common in young infants with RSV
• Nirsevimab: a long-acting monoclonal antibody (not a vaccine) that prevents severe RSV

Practical Checklist

• Count breaths for a full 60 seconds when child is calm
• Watch for chest pulling in between ribs or under the rib cage
• Track wet diapers — fewer than 1 in 8 hours = dehydration
• Use saline drops + bulb suction before feeding
• Run a cool-mist humidifier in the room
• Offer small, frequent feeds
• Keep child upright (held or in car seat) when possible
• Avoid smoke exposure — it worsens RSV

Frequently Asked Questions

Can my child get RSV more than once?

Yes — immunity after RSV is short-lived. Most kids have multiple infections, but each one is usually milder than the first.

How long is RSV contagious?

Typically 3–8 days, but infants and immunocompromised children can shed virus for up to 4 weeks.

Should I keep my child home from daycare?

Yes, until fever is gone for 24 hours without medication and they can comfortably participate in activities. Always notify daycare for outbreak tracking.

Is nirsevimab a vaccine?

No — it's a monoclonal antibody that gives passive, immediate protection for one RSV season. Vaccines train the immune system to make its own antibodies; nirsevimab provides them directly.

Can I get nirsevimab if my baby already had RSV?

Yes. Natural infection doesn't always provide reliable immunity, and nirsevimab still reduces severity of subsequent illness during the same season per CDC guidance.

Why does RSV hit babies harder than older kids?

Infant airways are tiny (about 4 mm wide). Even small amounts of mucus and swelling block airflow significantly more than in older children.

Can adults get RSV from a child?

Yes. RSV in healthy adults usually causes a bad cold. In adults over 60 or with heart/lung disease, it can be serious — newer adult RSV vaccines are now FDA-approved.

Is wheezing during RSV the same as asthma?

Not the same, but RSV bronchiolitis in infancy is associated with later wheeze and asthma risk. Discuss prevention with your pediatrician if there's a family history.

Can I use a nebulizer at home for RSV?

Generally no benefit for routine RSV. Albuterol nebulizers are not recommended unless your child has known asthma. Ask your pediatrician.

Sources & References

1. Respiratory Syncytial Virus (RSV) — For Healthcare Providers — CDC link
2. RSV Surveillance & Burden — CDC link
3. Bronchiolitis Clinical Practice Guideline — American Academy of Pediatrics link
4. Nirsevimab (Beyfortus) Use in Infants — AAP link
5. FDA Approves Nirsevimab — U.S. Food and Drug Administration link
6. Maternal RSV Vaccine (Abrysvo) Recommendation — CDC ACIP link
7. RSV in Infants and Young Children — American Lung Association link
8. Bronchiolitis: Diagnosis and Management — AAFP link
9. Cough and Cold Medicines in Children — FDA Consumer Update link
10. Hand Hygiene — CDC link
11. RSV Vaccine for Pregnant People — ACOG link
12. Childhood Bronchiolitis & Future Asthma — NEJM link
13. Real-World Effectiveness of Nirsevimab — JAMA Pediatrics link
14. Caring for Your Sick Child at Home — HealthyChildren.org (AAP) link
15. WHO RSV Vaccine Position Paper — World Health Organization link

Medical disclaimer

This article is health information for education only. It is not medical advice, a diagnosis or a treatment plan. In an emergency, call 911. Researched and drafted with AI-assisted tools and fact-checked by a human editor against the sources listed above. How we create our content.