Richard Haass: Will a vaccine be free-for-all? Or just a free-for-all?

A national-level approach to a vaccine is a recipe for disaster - the approach must be global, writes Richard N Haass

Imperial College London is one of the facilities trying to develop a potential Covid-19 vaccine.

The global toll of the Covid-19 pandemic is enormous: more than a half-million lives lost, hundreds of millions out of work, and trillions of dollars of wealth destroyed. 

And the disease has by no means run its course; hundreds of thousands more could well die from it.