A needle guard for a syringe, includes a base portion having a syringe connection for connecting a syringe and a cover portion and a base portion. The base portion and cover portion are engaged to expose the needle in a use position for administering the syringe to a patient, and after use, the cover portion is configured to slide on the base portion to an extended position on the base portion to cover the otherwise exposed point of the needle in a deployed position. A spring is arranged between the base portion and the cover portion to urge the cover portion to the deployed position on the base portion. An engagement arrangement between the base portion and the cover portion latches the base portion and the cover portion in the use position, and after use, in the deployed position.