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.
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.