PassFinals
Paediatrics

Rubella

Usually mild rubella causes a fine maculopapular rash and posterior lymphadenopathy, but infection in early pregnancy can cause congenital rubella syndrome, making prevention and urgent pregnancy assessment central.

In a nutshell

Rubella is usually mild: a fine rash with tender posterior auricular or suboccipital nodes. The high-yield danger is congenital rubella syndrome after maternal infection, particularly early in pregnancy. Suspected cases need notification, appropriate testing, exclusion and urgent specialist assessment of pregnancy contacts.

Classic presentation

A mildly unwell child or adult with a fine facial-to-body rash and tender posterior auricular/suboccipital lymphadenopathy.

Key points

  • Rubella may be asymptomatic or mild, so clinical suspicion and exposure history matter.
  • Tender posterior auricular and suboccipital nodes are a classic clue.
  • Infectiousness begins about 1 week before symptoms and lasts at least 5 days after rash onset.
  • Congenital rubella syndrome classically includes sensorineural deafness, cataracts and congenital heart disease.
  • Risk to the fetus is greatest when infection occurs early in pregnancy; any pregnancy exposure needs urgent specialist assessment.
  • MMR/MMRV is live and is not routinely given during pregnancy; vaccinate susceptible people before pregnancy or postpartum.
  • There is no specific antiviral treatment.

First-line investigation

Clinical assessment plus UKHSA-directed rubella testing, with urgent pregnancy and immunity assessment where relevant.

Management

Recognise, isolate and notify

  • Suspect rubella with a fine rash and posterior nodes, keep the patient away from vulnerable contacts, notify through UKHSA and arrange directed testing.1,4

Treat symptoms safely

  • Use rest, fluids and age-appropriate symptom relief; there is no specific antiviral and aspirin should not be given to children under 16.2,6

Protect pregnancy

  • Refer a new rash or significant rubella exposure in pregnancy immediately to maternity or specialist services for testing, risk assessment and counselling.2,3

Apply exclusion and prevention

  • Exclude for at least 5 days after rash onset, check household vaccination status and offer MMR/MMRV to susceptible non-pregnant people or postpartum when indicated.2,5,1

Exam traps

  • The maternal illness may be mild even when fetal consequences are serious.
  • Do not diagnose rubella from the rash alone; confirm through the appropriate laboratory and public-health pathway.
  • Exclude for at least 5 days after rash onset, not just until the fever settles.
  • Do not give MMR/MMRV routinely during pregnancy; refer pregnancy exposure rather than vaccinating as a substitute for assessment.
  • Do not confuse posterior lymphadenopathy of rubella with Koplik spots and the three Cs of measles.

Illustrations

Rubella maculopapular rashA clinical photograph showing the fine, diffuse pink maculopapular exanthem of rubella across the trunk.CDC, Wikimedia Commons · Public domain

Key sources

  1. UKHSA: Rubella, the Green Book chapter (Current UK rubella immunisation and public-health guidance, including MMRV schedule updates.)Updated 14 Apr 2026
  2. NHS: Rubella (Current NHS information on symptoms, infectious period, pregnancy risk and vaccination.)Updated 13 Mar 2026
  3. NHS: Infections in pregnancy that may affect your baby (Current NHS pregnancy advice for rubella exposure and infection.)
  4. UKHSA: Notifiable diseases and how to report them (Current England notification requirements; suspected rubella is routine-notifiable.)Updated 19 May 2026
  5. NHS: MMR and MMRV vaccine (Current NHS vaccination schedule, contraindications and catch-up information.)
  6. BNF online (Current UK prescribing information for symptomatic treatment and vaccines.)

This page is exam revision material, not medical advice, and must not be used for patient care. Always check drug doses against the BNF and current guidance. Full disclaimer.