COVID-19 Air Traffic Visualization: Worldwide Spread of COVID-19 Accelerated Starting on February 19, 2020   [open html - 0B]

From the Webpage: "In this report--one of several from a RAND Corporation team examining the role of commercial air travel in the coronavirus disease 2019 (COVID-19) pandemic--we use our COVID-19 Air Traffic Visualization (CAT-V) tool to estimate when COVID-19 transmission via commercial air travel began to rapidly accelerate throughout the world. The tool combines daily COVID-19 case data from Johns Hopkins University with detailed air travel data, including travelers' country of origin and country of destination, from the International Air Transport Association (IATA)."