... disease should actually be to make it amenable to measurement. On the one hand, we are made aware by Chakraborty, in a recent communication1, and even in an earlier paper2, that he had ... epidemiological situation in India, as shown in Table 1, that is, the prevalence rates were different from area to area and not similar, as was their hypothesis. In giving an average prevalence rate for ... consider in estimating the radiologically active disease. Instead of investigating only two sputum samples from X-ray abnormals, eight samples were examined in a study by the NTI, in order to arrive...