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.
A directly observed therapy program helps in several ways. The healthcare worker can help you remember to take your medicine and complete your tuberculosis treatment. This means you will get well as soon as possible. With a directly observed therapy program, you may need to take medicine only 2 or 3 times each week instead of every day.