WHICH OF THE FOLLOWING STATEMENTS ABOUT TUBERCULOSIS TESTING IS ACCURATE? A POSITIVE SKIN TEST REACTION INDICATES EXPOSURE TO TUBERCULOSIS BUT IS NOT A DIAGNOSTIC OF ACTIVE TUBERCULOSIS; FREQUENT SERIAL XRAYS ARE REQUIRED TO MONITOR PROGRESSION OF TUBERCULOSIS LESIONS IN THE LUNGS WHEN THE TB SKIN TEST IS POSITIVE; THE RESULT OF THE TB SKIN TEST IS NOT AFFECTED BY A HISTORY OF BACILLUS CALMETTE-GUERIN VACCINE ADMINISTRATION; OR A POSITIVE SKIN TEST REACTION MEANS THAT TEH AREA OF ERYTHENA WAS GREATER THATN 10 MM IN DIAMETER AT 48 HOURS