What type of virus causes measles?

The virus enters through the respiratory tract and can then affect the body more widely. Early illness may include [Fever](/symptoms/fever/), cough, runny nose, and sore or watery eyes; a rash may appear later. Because these signs overlap with other infections, symptoms cannot confirm measles by themselves. [Swollen Glands](/symptoms/swollen-glands/) may accompany many illnesses. Read the [Measles](/conditions/measles/) condition guide for a fuller symptom and care overview.

Treat suspected measles as contagious until a clinician advises otherwise. Keep the person away from shared indoor spaces and call a [GP Consultation](/treatments/consultations-and-assessment/gp-consultation/) service before an in-person visit. Support comfort with rest and fluids, and use age-appropriate fever care according to professional advice. Review [MMR Vaccination](/treatments/preventive-care-and-vaccination/mmr-vaccination/) records for the person and close contacts; vaccination is the main preventive measure discussed with healthcare professionals.

Arrange prompt assessment for fever with a spreading rash, suspected exposure, or concern about an unvaccinated contact. Seek urgent help for breathing difficulty, confusion, severe dehydration, unusual sleepiness, or a seizure. State that measles may be involved before entering a clinic so the service can plan contact safely.

Ask whether testing or assessment is needed, how to reduce household exposure, which fever measures are suitable, and whether vaccination advice applies to close contacts.