These are the things we know we don’t know about Covid-19
Until facts become clearer in four crucial areas, governments will battle to fight the virus in an informed way
What we don’t know is as important as what we do when it comes to thinking about the coronavirus.
Governments’ strategic planners will have at the core of their operation a long list headed “known unknowns”. It will help to inform virtually every decision they make today and in the weeks to come.
The concept was popularised by Donald Rumsfeld, the former US defence secretary, in the run-up to the invasion of Iraq. Asked at a press conference about the lack of evidence linking Saddam Hussein to weapons of mass destruction, he told reporters: “There are things we know we know. We also know there are known unknowns; that is to say, we know there are some things we do not know.”..