Why would you start or undergo treatment for something that is not confirmed?? If I read this correctly you had sputum testing. If so you wait for the results and do nothing until then. Probably 95% of sputum tests come back negative. You are doing all this in an effort to save a few weeks on getting your visa? I have never really heard of someone doing this. My wife did sputum, it was negative, did her interview and got her visa. For those that get a positive result, they start treatment, once completed follow the steps given to them.