This was a 2019 simulation exercise by U.S. national agencies to test the country's ability to handle a potential pandemic. They found the U.S. would not be able to address the pandemic. The simulated virus was dubbed "H7N9 Influenza". (and, there is such a strain. https://en.wikipedia.org/wiki/Influenza_A_virus_subtype_H7N9
Ironically, the COVID-19 pandemic started in 2020.
6 - Aerosols and Transmission of Respiratory Viruses 101 by Linsey Marr from The National Academies on Vimeo.
Graphic source: https://www.cdc.gov/infectioncontrol/basics/transmission-based-precautions.html
Graphic source: https://www.cdc.gov/infectioncontrol/basics/transmission-based-precautions.html
Graphic source: https://www.cdc.gov/infectioncontrol/basics/transmission-based-precautions.html