Hands contaminated with Mycobacterium tuberculosis are usually only partially washed away by rinsing with tap water, and most of the germs can be washed away by washing hands with a sanitizer. Mycobacterium tuberculosis is more resistant to the external environment, but more sensitive to alcohol, heat and ultraviolet light. Therefore, when hands are contaminated with Mycobacterium tuberculosis, it may not be possible to wash them off completely by only rinsing with tap water. In this case, it is recommended to use 75% alcohol to thoroughly disinfect the hands, as Mycobacterium tuberculosis is sensitive to alcohol and will be inactivated in a few minutes, and then rinse thoroughly with tap water. There are no reports of Mycobacterium tuberculosis infection through hand contact, the bacteria are mainly transmitted through respiratory droplets, and it is sufficient to wash your hands in time. Consult your physician for specific advice.