When coronavirus vaccines first became available, state health officials in Virginia turned to software recommended by the Centers for Disease Control and Prevention to schedule appointments. But people complained that the software, called VAMS, was too confusing for older adults to use.
So the state switched to another system, PrepMod — but that had problems, too. Links sent to seniors for their appointments were reusable and found their way to Facebook, leading to one vaccination event in Richmond with dozens of overbookings. Some of those people threatened health care workers when they were turned away.