The same thing is true about the onset of disease. Many workers have forgotten how it all began. Most of the time the authorities are not keen on probing further. Here workers learn to remember the earlier symptoms. This is an important part of diagnosis.
Many workers find it difficult to perform the lung function test.
This involves breathing forcefully into a tube. One of the tasks of the training is to explain to workers the importance of the test. What is a ventilometer, what does it measure and other aspects. Asthmatic workers are given a broncho-dilator spray and are checked again with the ventilometer. This exercise has been rendered easier due to the ventilometer given by PRIA for the purpose of these training sessions.