You have not said positive to what.
If you mean drugs then yes, if the child has taken drugs, been breast fed by someone on drugs or been exposed to secondary drug smoke etc.
It's extremely unlikely, the hair test is 99.95% accurate.
Hepatitis C infection does not directly cause a positive result for cocaine in a hair strand test. However, it's possible for someone with hepatitis C to also use cocaine, which could lead to a positive result. Each substance is detected separately in hair tests.
No
The child probably ingested the drug if they came up positive for cocaine on a drug test. There are some medications, though rarely prescribed to children, that can cause a positive for Cocaine. If the child has recently had surgery, medicated for urination problems, suffers from a mental condition and is medicated for it. There are a few reasons that it is possible, but the younger the child the less likely. All this is possible assuming that the cocaine was ingested For a follicle test it is extremely impossible. The hair is tested, once a false positive is given a new sample is taken and the hair is washed. The wash water is tested and the cleaned hair is tested. If the hair is positive the child ingested it. If the hair is negative and the water is positive then the child was in an environment where illegal drugs were being used.
A thin strand of hair is called a hair filament or a hair strand.
It would have gotten in your child's hair or system because he's doing speed.
A single strand of human hair is called a "strand" or "hair follicle".
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The mass of a strand of hair varies depending on the thickness and length of the hair. On average, a single strand of hair typically weighs around 0.6 milligrams.
On average, a single strand of hair weighs about 1 milligram.
A single hair strand can survive for about 2 to 7 years before naturally falling out and being replaced by a new hair strand. Throughout its life, a hair strand goes through phases of growth, rest, and shedding as part of the hair growth cycle. Different factors like genetics, health, and environment can influence the lifespan of a hair strand.
It is a strand of hair.