Respiratory syncytial virus (RSV)

Also called RSV

Respiratory syncytial virus (RSV) is a common virus that causes coughs and colds, mostly in winter. Almost all children have had it by the age of 2. For most people it is mild, but it can cause serious chest infections such as bronchiolitis and pneumonia in babies, young children and older adults.

Last updated Nov 9, 2026

What it is

Most people get better within 1 to 2 weeks with rest, fluids and fever medicines.

Vaccination in pregnancy protects newborn babies, and an RSV vaccine is offered to some older adults.

Common signs

  • A runny or blocked nose
  • A cough
  • Sneezing
  • Tiredness
  • A high temperature
  • Breathing difficulties or poor feeding in babies

How it is usually diagnosed

  • Questions about symptoms and an examination
  • Sometimes a nose or throat swab

Records worth keeping

Keeping these together makes each appointment easier, especially when you see a new doctor:

  • Swab results
  • GP or hospital notes
  • Vaccination records

Questions to ask your doctor

  • Am I or my baby eligible for the RSV vaccine?
  • How can I tell if breathing is getting worse?
  • When should my child go back to nursery?

When to get help right away

Call 112 or go to the nearest emergency department if you have:

  • A baby or child struggling to breathe, with pauses in breathing, blue lips or not feeding: call 112

This page is general information. It is not a diagnosis and does not replace a doctor who knows your history. Medfold keeps your records organised; it does not interpret them.

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