The state of Michigan is considering dropping pre-employment drug testing requirements for marijuana.

DETROIT There seem to be enough coronavirus (COVID-19) tests available in Metro Detroit, but results are often taking so long to come back that the tests are rendered essentially useless. Testing and tracing are pillars of the public health response to COVID-19, but right now testing is falling short across the U.S. For everyone else, COVID-19 test results take more than seven days, or in some cases, even as long as two weeks. LabCorp, another national testing corporation, said on July 19 that its tests are taking an average of 3-5 days to come back from the time of specimen pickup. Anyone who wants a faster result on a COVID-19 test should check with local facilities performing tests in their own labs.

The FDA said Saturday that it reissued an emergency use authorization to Quest Diagnostics to use its COVID-19 test with pooled samples. Pooling works best with lab-run tests, which take hours -- not the much quicker individual tests used in clinics or doctors offices. Thats because the logistical and financial benefits of pooling only add up when a small number of pools test positive. Experts generally recommend the technique when fewer than 10% of people are expected to test positive. For example, pooling would not be cost-effective in Arizona, where a surge has pushed positive test results to well over 10%.

Following are developments Monday related to the national and global response, the work place and the spread of the virus. Quest Diagnostics is seeing growing demand for its COVID-19 testing services, though at a cost. The company said Monday that second-quarter testing volumes in its base business (excluding COVID-19 molecular and antibody testing) declined approximately 34% from a year ago, according to preliminary results. The company said Monday that the increase was driven by better-than-expected demand for its full-suite of solutions aimed at helping support customers COVID-19 testing needs around the world. PerkinElmer experienced strong demand for its RT-PCR and serology tests, RNA extraction systems and kits, and automated liquid handling instrumentation.