To drive a vehicle, it is necessary to carry certain documents that demonstrate that the vehicle and the driver comply with traffic regulations. These documents are:

- **Driving license**: Certifies that the driver is authorized to operate a vehicle.
- **Vehicle registration certificate**: Confirms that the vehicle is registered and authorized to be on the road.
- **Technical inspection card (ITV)**: Indicates that the vehicle has passed the necessary inspections and is in good condition to be on the road.
- **Civil liability insurance**: Covers damages that the vehicle may cause to third parties.

The **health card** is not a document related to driving or the vehicle, so it is not necessary to carry it in the car. Its function is different, as it is related to medical care and not to traffic regulations. Therefore, among the given options, the health card is the document you do not need to carry in the vehicle.