The GAO told the government in 2015 to develop a plan to protect the aviation system against an outbreak. It never happened

Howard Kunreuther of the Wharton School said good leadership is critical in preparing government agencies for catastrophic events. “You cannot deal with this at the level of just saying let each agency operate,” he said. “You need to have some way to bring them together and to indicate that this is a problem, which cannot be solved by one agency alone. That is something that leadership is going to have to suggest—‘This is the way to do it’—and we don’t have that right now.”

・ From The Washington Post