Why 2 TB tests?

I got a job at a hospital and I had to get 2 TB tests. First one on a friday then read it monday.. was clear.. THen another one that following friday . Forgot to get it read on monday so i had to get another done on monday and i was clear again.. IS it bad that I got 3 doses that wont hurt me will it? WHy did... show more I got a job at a hospital and I had to get 2 TB tests. First one on a friday then read it monday.. was clear.. THen another one that following friday . Forgot to get it read on monday so i had to get another done on monday and i was clear again..

IS it bad that I got 3 doses that wont hurt me will it?
WHy did i Need to go for 2 doses? If i passed the first time.
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