It’s an actual epidemiological tool. And they can do it thru smart phones, if they wanted to. Remember we had plans in place to make any pandemic’s impact negligible. They were not followed. In fact our own citizens have been against the very plan the citizens paid for with tax money. If a plane makes a water landing and a number of passengers block the exits. Guess what? A lot of people die. Follow a plan. Stop disrupting the plan! read the fema plan on pandemics, written during george h.w. Bush era I think. not about politics , just about saving lives.