Macron tells critics: vaccine passport will protect all our freedoms

When the Great Plague struck Marseille in 1720, killing more than half of the city’s population, travellers were ordered to carry a “bill of health” and ships arriving at the Mediterranean port underwent a 40-day cordon sanitaire or quarantine. As a gateway for trade, the city authorities struggled to find a delicate balance between halting the spread of the disease and damaging vital commerce.

Three hundred years on, President Emmanuel Macron is walking an equally tricky tightrope just eight months before he seeks re-election in April 2022. And unlike the ancient Marseillais, Macron has...