The little people love you.  Let's go see a dwarf about a gallium scan.
A PPD involves planting a fragment of TB under the skin to see if the immune system recognises it, because of her compromised immune system, our Patient could have TB but not recognise it.
[SEP] A PPD involves planting a fragment of TB under the skin to see if the immune system recognises it, because of her compromised immune system, our Patient could have TB but not recognise it. [SEP] The little people love you.  Let's go see a dwarf about a gallium scan.