In communities with heterogeneous history of BCG vaccination, IGRA seems to estimate TB infection more accurately than any other criteria using TST.You might think that conducting such a study in a poor country with high rates of TB is of questionable value but the fact is that they did and the declaration of TB as a national priority has committed the Vietnamese government to lowering TB. The only way to do that is to stop new infection and the disease status of HCWs are critical to this path. WHO representatives are advocating that Asian countries strengthen their health systems and that drug resistant TB is man made and commenting that
"Our available tools work but they are not enough,"
.
