Measles
Understand measles through a concise source-checked overview, clear reporting context and direct links to official public-health information.
What it is
Measles is a highly contagious viral disease that can cause serious complications. People who are not protected against measles are at risk.
Transmission and recognition
Measles spreads through the air. Infectious virus can remain in an airspace for up to two hours after an infected person leaves. Fever, cough, runny nose, red or watery eyes and a rash are common features. Pneumonia and inflammation of the brain are among the serious complications. A symptom list is not a diagnostic tool.
Prevention and care context
MMR vaccination provides protection against measles. Individual eligibility, timing and action after a possible exposure require current local guidance or professional advice. Children and some other groups can be particularly vulnerable to complications.
How to read outbreak reporting
A report of an imported case, a local transmission chain and a national annual total answer different questions. Look for the place and date of exposure, the case definition and whether investigators have established a link between cases.
Sources & Verification
AI-assisted research and writing. Source checks do not represent clinical review.
- CDC: Measles Verify original (opens in a new tab)
- WHO: Measles Verify original (opens in a new tab)
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