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The tuberculin response is mediated by
Trade Surplus
A situation where a country's exports exceed its imports, leading to a positive balance of trade.
Services
Intangible products or activities provided by one party to another, often involving a time-based performance to meet needs or bring benefits to recipients.
Canadian Dollar
The currency of Canada, represented by the symbol CAD or simply $ within Canada.
U.S. Dollar
The official currency of the United States, often used as a standard unit of currency in international markets due to its widespread acceptance.
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