What does a circle around it with a slash through it signify in emergency reporting?

The symbol of a circle with a slash through it is a widely recognized sign in emergency reporting that indicates definitive action has been taken regarding a casualty. This specific graphic denotes that a casualty has been secured, meaning that the individual in question is no longer in immediate danger, has been stabilized, or is safely accounted for in the situation being reported.

Understanding the significance of this symbol is crucial in emergency management, as it provides vital information to responders about the status of individuals involved in an incident. In contrast, the other options represent different scenarios that do not align with the specific meaning of the circle and slash symbol.