However, if your visa says that it is valid indefinitely, you should apply for a new visa, or travel under the Visa Waiver Program (VWP) if eligible as all indefinitely-valid visas are now obsolete. See further down this page.
Actually, no. You can't get TB by touching an infected person. Tuberculosis germs don't stick to clothing or skin; they hang out in the air. You also can't get TB by: 1  Giving an infected person a hug or a kiss. 2  Using the same toothbrush.3  Eating or drinking after an infected person.ou can't get TB by touching an infected person. Tuberculosis germs don't stick to clothing or skin; they hang out in the air. You also can't get TB by: 1  Giving an infected person a hug or a kiss. 2  Using the same toothbrush.
Part 1 of 3: How to Avoid Contracting TB. 1. Avoid exposing yourself to people with active TB. Obviously the most important precaution you can take to prevent TB is to avoid being around people with active TB, which is highly contagious, especially if you have already tested positive for latent TB. Although you don't feel sick with a latent TB, and it isn't contagious, you will probably be prescribed a course of antibiotics to kill the inactive TB germs and prevent tuberculosis from turning into an active disease. 2  The 2 most common treatments are: Taking isoniazid daily or twice a week.