It is possible, but usually unlikely, to catch a disease by playing someone else’s instrument, mainly saliva-borne diseases such as hand-foot-mouth disease, mumps, and influenza. A musical instrument used by someone else may be contaminated with saliva, and viruses transmitted through saliva may remain on the instrument, so if the last person who played the instrument had a disease, there is a risk of being infected with the disease if contact is made again. There are many types of viruses that are transmitted through saliva, mainly influenza virus, mumps virus, and certain enteroviruses, so it is important to be aware that these viruses are transmitted through saliva and the digestive tract. If you just blow on someone’s musical instrument, you may be infected, but the probability is small, so don’t worry too much. It is recommended that you rinse your mouth and disinfect it in time to stop the spread of viruses and bacteria.