Around 35 million Americans have been vaccinated and roughly 1.6 million more are getting shots a day, but it’s been a bumpy road to get to this point, as state and local distribution plans have been beset by bureaucratic and technological blunders. Dan examines one of the biggest tech failings — a $44 million vaccination appointment system built by Deloitte that most states are backing away from — with investigative health care journalist Cat Ferguson.