So strange. I went for that test years ago and hadnt had a smoke in a few hours and it was 2 lol. Nurse was not amused as it did not teach me anything!
Dont know why yours is 11, possibly car exhaust fumes etc. Dont know an awful lot about it but i remember the nurse said to me that mine was 2 just due to the fumes from cars etc, non smokers would be around that!
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