Annual Drug Testing Index reveals fifth straight year of increases in detection rate of amphetamine and heroin, and marijuana positivity has increased 47 percent.
Following years of declines, the percentage of employees in the combined U.S. workforce testing positive for drugs has steadily increased over the last three years to a 10-year high, according to an analysis of nearly 11 million workforce drug test results by Quest Diagnostics.
from Safety http://ift.tt/2d6bkJU
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