With the shift to AppleCare+, Genius Bar staff will no longer have the option of offering free replacements, so customers who have been aware of Apple's informal replacement policy should be mindful of the change.
Prevention of TB involves both early treatment to reduce transmission and isolation of the infected person until they are no longer contagious. There is a vaccine against TB, but it is not used routinely in the U.S. because of efficacy issues and other problems.
Yes. Active TB disease can be cured with medicine. If you have active TB, you must take your medicine for at least 6 months. TB treatment is free to the patient at the Department of Health & Mental Hygiene chest centers.