not necessary if positive and have your record with size/date

chest x-ray is good for a year.

you have to take tb skin test if:
1. previuos skin test is negative
2. test was positive but you don't have your record with date/size. The civil physician wouldn't accept your verbal statement that your skin test is positive


The only thing that the civil physician would take it verbally is the chicken pox as a child

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