Here in the US, the government is throwing money at it as fast as they can. And while that money will likely help, I don't understand the economics of it. As of today, official estimates of lock-down are from two-to-eighteen months. Where is that money coming from and what is going to happen when it runs out? Economics is not a science of numbers as much as it's a science of social action and interaction. If we aren't interacting, how will we replenish the flow of money coming from the government? I don't know that we have a formula for how a society under quarantine is to operate.
On the other hand, we can't lay down and die. I am certain some business, perhaps some complete industries, won't survive this. But humanity will. Our focus should be to support each other and determine the form said survival will take and institute it...., sooner rather than later.