So the 43 figure counts outbreaks, while 4,588 counts confirmed cases.

These are cases that have been checked and shown to be real.

Seventeen percent of confirmed cases were in children under five.

These are cases that have been checked and shown to be real.

Measles is a contagious disease caused by a virus, so an outbreak count helps show how cases are grouped.

Here, an outbreak is a group of connected disease cases.

Can you clarify what counts as an outbreak in these figures?

Here, an outbreak is a group of cases that meets the report’s definition.

Here, an outbreak means three or more related cases.

In this report, an outbreak is three or more cases connected to each other.

Measles is a contagious disease caused by a virus, so an outbreak count helps show how cases are grouped.

A contagious disease can pass from one person to another.

The 4,588 cases reported by October 22 are roughly twice the 2,289 cases reported for all of 2025.

This means the number is close to two times as large.

Measles was declared eliminated in the United States in 2000.

Here, this means measles was no longer spreading continuously in the United States.

Elimination means that continuous spread of a disease has been stopped in a place.

This means a disease is spreading without stopping from person to person in a place.

Children and young people make up a large share.

Here, this means children and young people form a large part of the total.