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Tech companies have been creating apps and devices for tracking employee wellness and promoting customer safety as restaurants and other businesses start to reopen, but experts caution that they could give employees and customers a false sense of security and possibly do more harm than good. "Some companies are embarking upon things that are not going to help and may actually set us back," said Michael Osterholm, director of the University of Minnesota's Center for Infectious Disease Research and Policy. Tools that the technology relies on, such as antibody test results and infrared thermometers, can be inaccurate, leading to a false sense of security.