If my child received a tuberculosis vaccine (BCG vaccine) in the country of origin, won that cause a false positive skin test for tuberculosis?
• No. If the skin test reaction is equal to or greater than 10 mm in size, this indicates infection, regardless of a history of BCG vaccination, if the child comes from a country with a high incidence of tuberculosis. The World Health Organization reports 22 countries account for 80% of global tuberculosis in 2006, and the list includes the Russian Federation, China, Vietnam, Cambodia, the Philippines, India and Pakistan. Tuberculosis continues to be a global epidemic problem and many other countries not listed still have a high incidence of TB in their populations. To prevent future disease and complications, it is important to accurately identify those who have tuberculosis infection and treat them appropriately.
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