The strongest businesses have clear processes and proceedures. They make sure they have a risk register to identify and help mitigate against the risks their business might face in the future. Whilst it is almost certain no business had global pandemic on their risk register pre-March 2020, well run businesses certainly have it on their risk register now. 

The best way to survive the unexpected is to identify and control what you can predict so your business is in a stronger position when the unexpected happens.