Tuberculosis (TB) is extremely common worldwide, but not in the United States. Experts suspect one out of every three people in the world is infected with TB. Over 95% of deaths from TB occur in developing countries. Worldwide, the number of TB cases and deaths are slowly declining. Since 1992, the number of TB cases reported yearly in the United States has decreased. Most of the TB patients in the United States were born in other countries, where TB is more common.
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