More on Columbus

Here is a comparison of the competing diagnostics. Whether they are indicative of a maturing trend or a "tipping point" is something that only time will tell, four years may not be sufficient time to draw any conclusion as to the pattern. What is obvious is that the market for the skin test has crashed.

Regardless of the projection the take home message is

The TB program primarily uses the QFT Blood Test to screen for TB exposure.

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