Hospital Volunteer

Today I went to have my tb test read.  I was pretty surprised to find out that they give two.  So Wednesday I have to get another one, not that anything was wrong with the first one.  And next Friday I have to have the second one read.  My lab work wasn't back yet but she said it wouldn't prevent me from volunteering.  I wonder why they waste the money if they don't need it.  My drug test was ok.  I don't know when I start volunteering, but I seem to be keeping the hospital workers busy.