The Covid-19 pandemic did not dampen workforce drug testing positivity for marijuana, which continued to increase last year in the general U.S. workforce, according to a new Quest Diagnostics analysis. Based on 7 million-plus urine drug tests collected between January and December 2020, the overall rate was down only slightly in 2020, 4.4 percent, versus 2019, whose 4.5 percent level…
Read More