Do you have maid? I used to let my maid to run the daily routine of my son. Since he's got asthma, I have been monitoring him closely. I am starting to think that my maid is part of the reason he's got asthma. She is too slow and she would even let him run around naked when it's below 10C. Gosh! I should not trust her that much. It's my fault too.
We used to think she was good coz we never monitor her work and our son was never sick. Now the legend has gone. The truth is she has been lucky for the first 2 years.