Only if: the test is done too early, or (obviously) if the test is defective or run incorrectly.
Answered 8/12/2018
3k views
Unlikely: Anything is possible but it is highly unlikely.
Answered 12/4/2014
3.5k views
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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