News Where’s the COVID-19 vaccine? Who’s been vaccinated? Here’s how we’ll know. December 16, 2020Aleszu Bajak and Janet Loehrke, USA TODAYComments Off on Where’s the COVID-19 vaccine? Who’s been vaccinated? Here’s how we’ll know. Data on patients and vaccine shipments will flow through a complex network of state and federal data systems. How will it all work?