Now that you have an idea of who your audience is, it is time to really start on the Challenge. As a group (you can start this is smaller groups), decide just what you need to inform your audience of. Is it just coronavirus? Or should there be questions of justice involved? What about future viruses? Should people be prepared and, if so, just how? What are the best means of informing your audience?
Work in small groups but keep the entire class informed of what you are doing.
And, if you have not, make sure that everyone is keeping an adequate log/journal. The best way to do this is through a spreadsheet that all agree to use. Discuss that as well.