How does an entire city get vaccinated? Rolling out the COVID-19 vaccine in Philadelphia

Shipments of Pfizer's COVID vaccine are expected to start arriving in American cities early next week. It marks the beginning of a massive effort to vaccinate as many people as possible to help bring the coronavirus pandemic to an end. So what does that process look like? How do you manage the logistics of a massive operation like making sure an entire city gets access to the vaccine? Philadelphia was one of the cities that helped the CDC come up with a distribution plan, and Philadelphia Deputy Health Commissioner Dr. Caroline Johnson joins KYW Newsradio In Depth to talk about how the COVID-19 vaccine is going to be distributed, who's getting it first, and what needs to happen to put all of the incredibly important pieces of this logistical puzzle together.