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If the laryngitis is from a viral or bacterial infection, it is possible that the specific virus or bacteria can be contagious. However, if the laryngitis is from laryngeal cancer or overuse of the voice, it is not contagious.f the laryngitis is from a viral or bacterial infection, it is possible that the specific virus or bacteria can be contagious. However, if the laryngitis is from laryngeal cancer or overuse of the voice, it is not contagious.
Acute laryngitis is most commonly caused by a viral infection, such as a cold or flu. Another type of acute laryngitis is mechanical laryngitis. This can be caused by: 1  Overusing or misusing your voice.2  Excessive, singing, speaking or shouting. 3  Persistent coughing and throat clearing.4  A throat injury.aryngitis is an inflammation of the voice box, or larynx-the tube-like structure at the entrance of your windpipe (trachea). The Adam's apple represents where the larynx sticks out at the front of the throat. The larynx contains two membranes-vocal cords-which vibrate as air passes between them.