If there's an induration of more than 10mm, it means your friend is still exposed to TB.
But it doesn't mean, he still have the disease itself.
As what you have said, his on medications already...
I guess, NHA here are relying only to PPD test for diagnosis and not need a Sputum culture(which is the diagnostic test for TB)...
If there's an induration of more than 10mm, it means your friend is still exposed to TB.
But it doesn't mean, he still have the disease itself.
As what you have said, his on medications already...
I guess, NHA here are relying only to PPD test for diagnosis and not need a Sputum culture(which is the diagnostic test for TB)...