Measles transmission explained

An infected person releases virus-containing particles while breathing, coughing, or sneezing. Others may inhale them during close contact or in an enclosed room. Transmission does not require touching a rash or sharing food. The risk is shaped by ventilation, time in the space, and whether people have immunity. Symptoms such as [Fever](/symptoms/fever/) and cough can appear before the characteristic rash. The [Measles](/conditions/measles/) page gives condition-level context; [Swollen Glands](/symptoms/swollen-glands/) are not specific to measles.

Write down when and where the contact happened and whether the room was enclosed. Avoid visitors and crowded settings if symptoms develop. Contact a [GP Consultation](/treatments/consultations-and-assessment/gp-consultation/) service by phone before attending. Ask about [MMR Vaccination](/treatments/preventive-care-and-vaccination/mmr-vaccination/) for anyone whose protection is uncertain; a clinician can consider the timing and individual circumstances. Do not use another person’s medical record or vaccination history as your own.

Get medical advice promptly after a confirmed exposure or when fever and rash suggest measles. Seek emergency help for breathing problems, a seizure, confusion, severe dehydration, or difficulty waking. Tell reception or emergency staff about the possible infection before entering a shared area, allowing them to guide you safely.

Ask whether the contact counts as a meaningful exposure, how long to avoid others, whether household members require advice, and which warning signs need urgent review.