To assist an injured person in a traffic accident, it is essential to **call for help** and **check their breathing**. Here we explain why:

- **Call for help**: It is crucial that, if you witness an accident, you request assistance from emergency services. This ensures that the injured receive professional medical attention as soon as possible. Additionally, cooperating with the authorities and providing them with information about the accident is crucial for an effective response.

- **Check breathing**: If the injured person does not respond or move, they may be unconscious. In this case, it is vital to check if they are breathing. Breathing is a key indicator of the injured person's condition and can determine the urgency of the situation.

- **Do not move the injured person**: Unless it is absolutely necessary to move them to safety, you should not move the injured person. This is important to avoid aggravating possible injuries, especially in the neck or spine.

- **Do not give drinks**: You should not offer food or drinks to the injured, as this could complicate their condition, especially if they need surgery or have internal injuries.

By following these steps, you can provide effective initial assistance while waiting for emergency professionals to arrive.