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.
Latent TB is treated with a course of antibiotics for either three or six months, depending on what tablets you are given. It is important that you take the tablets properly and finish the full course of treatment to make sure that the TB bacteria are successfully killed.ou have a greater risk of catching TB (active or latent) if you: 1  know someone who has had TB in their throat or lungs. 2  live or work in poorly ventilated or overcrowded conditions, where TB can spread more easily. 3  have links to areas of the world where TB is more common, such as Africa, Asia or Eastern Europe.