Okay kiddo, have you ever heard of the clinic of Zaragoza? It's a hospital in Spain where doctors help people who are sick or hurt. But something bad happened there a long time ago with a machine called a radiotherapy machine.
The radiotherapy machine is a really big and important machine that helps to treat people who have cancer. It works by shooting special rays into the body that kill the cancer cells. But sometimes, if the machine isn't working properly or someone makes a mistake, it can accidentally shoot too many rays into a person.
And that's what happened at the clinic of Zaragoza. Some of the doctors and nurses were operating the radiotherapy machine incorrectly, and as a result, many people got too much radiation in their bodies. This made them very sick and caused a lot of problems for them.
The people who got too much radiation had to go to other hospitals to get help. The government and other people also got involved to figure out what went wrong and how to prevent it from happening again. It was a very big and scary accident that caused a lot of people to suffer.
So, that's the story of the clinic of Zaragoza radiotherapy accident. It's important for people who work with machines like the radiotherapy machine to always be careful and follow the rules to make sure that nobody gets hurt.