You better bring the maid to your own doctor's clinic to have checkup. I don't really trust the agency's clinic. Normally the report from agency will take few days. But my doctor call me the next day verbally tell me the result.
So before new maid comes to my home, I will bring her to my doctor's clinic to have thorough body check (including blood test). I will ask the maid to stay in the agency until the result comes out.