What might you notice at first?
RSV can cause a runny nose, cough, fever and reduced appetite. In a baby, feeding may become more difficult. Some develop faster or noisier breathing as the illness affects the lower airways. [1] [2]
These signs can occur with other infections too. A doctor assesses the baby’s symptoms and examines them; parents do not need to decide that the illness is definitely RSV before seeking care. [2]
Is RSV the same as bronchiolitis?
RSV is the name of a virus. Bronchiolitis is an illness affecting the small airways in the lungs, often caused by RSV, although other viruses can cause it too. RSV can also cause pneumonia, an infection of the lungs. [1] [2]
Most RSV infections are mild. However, when breathing becomes harder, a baby may not be able to feed enough and may become dehydrated. Severe illness may need hospital treatment, including oxygen or feeding support. [1] [2]
Which changes mean you should get help?
Alongside the emergency signs above, seek prompt medical assessment if your baby is feeding much less than usual, has fewer wet nappies, is unusually tired or seems to be getting worse. These changes need attention even if you do not yet know which virus is responsible. [3]
Very young babies, babies born prematurely, and those with certain heart or lung conditions or immune deficiencies can be more vulnerable to severe illness. Tell the doctor about these health details early in the conversation. [2]
What does supportive care involve?
“Supportive care” means helping a baby breathe and take in enough fluid while they recover. The clinical team decides whether care at home is appropriate or hospital support is needed. Antibiotics are not a routine treatment for RSV itself, but a doctor may prescribe them if there is a bacterial complication. [1] [2]
If the doctor advises home care, ask how to manage feeds and what changes should prompt another assessment. Note how feeding, wet nappies and breathing compare with your baby’s usual pattern. A home-care plan is not a reason to wait if breathing becomes difficult or an emergency sign appears. [2] [3]
How can carers reduce spread?
RSV occurs throughout the year in Hong Kong. It can spread through respiratory droplets and secretions, contaminated hands and objects. Wash hands before caring for your baby, clean frequently touched surfaces and toys, and keep indoor spaces ventilated. People with respiratory symptoms should avoid close contact with babies. [1]
For a baby who is currently unwell, assessment and care come first. Questions about preventive vaccination or infant antibodies can be discussed separately with your healthcare professional.
Related reading
Our RSV vaccine guide covers the separate prevention discussion. For an appointment, bring any relevant health records and tell the doctor when symptoms and feeding changes began.