Playing central midfield, French President Emmanuel Macron drew cheers from the crowd with his first touch — and was given plenty of space to turn from overawed opponents who retreated deferentially as he advanced with the ball.

The study, funded by the National Institutes of Health (NIH), was eagerly awaited in the United States because it looked at the possibility of ‘mixing’ vaccines – using a different vaccine than the initial doses for the booster shot – which is not currently allowed in the country.