All it would take to get this app completely off course and cause disinformation would be a group (any group, Foreign, Political etc) to report false information. Your suggestion, while well meaning is only a reliable solution in a utopia.
The best solution to get everyone back to work is to rely on the policies of industries deemed essential that have successfully been working this entire time. Wellness checks and temp readings before every shift are good options that are already in place for essential industries.
For the life of me I can’t figure out why so many are racking their brains, trying to come up with policies to get back to work instead of just looking towards businesses that have continued to work through this successfully. Their policies are already proven.
This back to work stuff isn’t as complicated as many make it out to be. We already have proven solutions in Essential industries. In fact, the simpler the solutions are, the easier they will be for a nation of 327 million people to follow.
