Measles
In short
Measles is a highly contagious viral infection that causes fever, cough, and a distinctive red skin rash. It spreads easily through the air when an infected person coughs or sneezes.
In plain words
It is a sickness caused by a virus that moves very quickly between people. Most people get a high temperature and red spots all over their body. It can be prevented with a simple vaccine.
A simple example
If an unvaccinated person sits near someone with measles in a waiting room, they are very likely to catch it through the air.
Why it matters
Because it spreads so fast, it can cause large outbreaks in communities. If left untreated, it can lead to serious problems like pneumonia or brain swelling.
Easy to mix up
Do not confuse it with rubella, which is also known as German measles but is generally less severe.