HMPV (Human Metapneumovirus) in Children
Content reviewed against published CDC, AAP, NIH guidelines
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Human metapneumovirus (hMPV) is a common respiratory virus first identified in 2001 that causes illness ranging from mild colds to severe bronchiolitis and pneumonia in young children. It is closely related to RSV and causes similar clinical presentations. By age 5, virtually all children have been infected at least once. hMPV is the second or third most common cause of lower respiratory tract infection in young children after RSV. It circulates primarily in late winter and spring.
Key takeaways
- Human metapneumovirus (hMPV) is a common respiratory virus first identified in 2001 that causes illness ranging from mild colds to severe bronchiolitis and pneumonia in young children.
- Duration: Mild cases: 7-10 days. More severe lower respiratory involvement: 2-3 weeks for full recovery. Cough may persist for 3-4 weeks. Hospitalized infants typically recover in 3-7 days with supportive care.
- Go to ER if: Severe difficulty breathing (grunting, nasal flaring, deep retractions)
- No vaccine currently available
Symptoms
How It Presents by Age
0-6 months
Can cause severe bronchiolitis similar to RSV. Wheezing, rapid breathing, poor feeding, and possible apnea episodes. May require hospitalization for oxygen support or feeding assistance.
Risk level: High — similar to RSV in severity
6-24 months
Common age for first significant infection. Bronchiolitis or pneumonia with wheezing, cough, and respiratory distress. Presentation is clinically indistinguishable from RSV bronchiolitis.
Risk level: Moderate to high
2-5 years
Can cause croup-like illness, bronchitis, or pneumonia. Upper respiratory symptoms predominate in many cases. Wheezing episodes may occur, especially in children with reactive airways.
Risk level: Low to moderate
5-12 years
Usually causes mild upper respiratory symptoms similar to a cold. Lower respiratory involvement less common in this age group unless immunocompromised or has underlying lung disease.
Risk level: Low
Treatment
Supportive care
No specific antiviral treatment available. Management focuses on maintaining oxygenation, hydration, and nutrition. Most cases are managed at home.
Respiratory support
Nasal suctioning for congestion (especially before feeds in infants). Supplemental oxygen if O2 saturation below 90-92%. High-flow nasal cannula or CPAP for more severe respiratory distress requiring hospitalization.
Hydration and feeding
Small, frequent feeds for infants with respiratory difficulty. IV fluids if unable to maintain oral intake. Thickened feeds not recommended.
Fever and comfort
Acetaminophen or ibuprofen (6+ months) for fever and discomfort. Bronchodilators may be trialed but evidence of benefit is limited (similar to RSV bronchiolitis).
Home Care
- Use a bulb syringe or nasal aspirator to clear nasal congestion
- Saline nasal drops before suctioning to loosen mucus
- Run a cool-mist humidifier in the bedroom
- Keep baby upright for feedings and slightly elevated for sleep
- Offer small, frequent feedings
- Monitor breathing rate and effort
- Ensure adequate fluid intake
- Keep environment smoke-free
When to Worry
Go to the ER if:
- Severe difficulty breathing (grunting, nasal flaring, deep retractions)
- Blue or gray color around lips or fingertips
- Pauses in breathing or apnea
- Unable to feed or drink due to respiratory distress
- Extreme lethargy or difficult to arouse
- High fever in infant under 2 months
- Child with known heart/lung disease in respiratory distress
Call your doctor if:
- Infant under 3 months with cold symptoms and fever
- Wheezing or noisy breathing
- Cough worsening or persistent beyond 2 weeks
- Decreased feeding in an infant
- Fever lasting more than 5 days
- Child with underlying heart or lung disease developing respiratory illness
- Premature infant with respiratory symptoms
Keep an eye on:
- Breathing rate over 60 breaths per minute (infants) or 40+ (toddlers)
- Visible ribs or belly moving excessively with breathing (retractions)
- Grunting with each breath
- Refusing feeds or taking less than half normal intake
- Fewer wet diapers than usual (dehydration)
- Pauses in breathing (apnea) especially in young infants
Prevention
- Frequent handwashing with soap and water
- Avoid close contact with sick individuals
- Clean and disinfect frequently touched surfaces
- Keep infants away from people with cold symptoms
- Avoid crowded indoor spaces during peak season (late winter/spring)
- Do not share cups, utensils, or pacifiers
- Breastfeeding may provide some protective antibodies
- No vaccine currently available (under development)
Contagion & Incubation
Incubation
3-6 days after exposure (range 3-9 days)
Contagious for
Viral shedding typically lasts 1-2 weeks. Most contagious during the first 3-5 days of symptoms. Young children and immunocompromised individuals may shed virus longer.
Duration
Mild cases: 7-10 days. More severe lower respiratory involvement: 2-3 weeks for full recovery. Cough may persist for 3-4 weeks. Hospitalized infants typically recover in 3-7 days with supportive care.
Frequently asked questions
How long does hmpv (human metapneumovirus) in children last?
How does human metapneumovirus (hmpv) infection spread?
When should I take my baby to the ER?
Can human metapneumovirus (hmpv) infection be prevented?
When can my child return to daycare?
Sources
All content follows our editorial policy and is reviewed against published clinical guidelines.
2,705 evidence-based guides6 authoritative medical sources
Related Illnesses
Bottom line
HMPV (Human Metapneumovirus) in Children is a viral illness that typically resolves on its own. Seek emergency care if severe difficulty breathing (grunting, nasal flaring, deep retractions).
Trust your instincts. If something feels wrong, reach out to your pediatrician. Worrying about your baby means you care — that is a good thing.