Many companies are outfitting their workplaces to keep employees healthy and prevent another COVID-19 flareup when they return to the office, with efforts ranging from pricey high-tech systems to common-sense methods. Workplaces will be dramatically transformed by the pandemic, and executives say formulating a plan to ensure employees’ physical safety and mental comfort is anything but easy. The U.S. hasn’t experienced anything like this situation in recent memory, and conflicting messages about best practices abound. Federal, state and local authorities’ pronouncements aren’t always clear and can contradict one another, leaving managers confused. Employers anticipate an increase in lawsuits from workers over how companies managed their coronavirus responses.