hi doc. my friend had her chest xray 3 months ago and there was no apperent abnormalities result.. after 3 months she should repeat her chest x ray because it is the agency's policies,, actually, she is about to go abroad... it was found out that she has resiual fibrosis right even the fact that she dont have any TB or her previous chest x ray was NORMAL,, what this mean??? hope you can give me an definite answer for this...???? thank you so much doc.... God bless.....