We reported earlier on attempts to win round people who are proving reluctant to get the Covid vaccine. But it’s not confined to any particular age or ethnic group.

Look at France, or America, and there are people across the spectrum who are hesitant about the jab.

It’s often down to distrust in authority rather than ignorance or rejecting science altogether.

So what’s the best way to get people on board – celebrities, experts, political leaders?

The psychologist Adam Grant has been writing about exactly this kind of dilemma in his book ‘Think Again’.

We spoke to him and asked how he’d deal with vaccine hesitancy.