New border controls came into force in France as part of a massive effort to contain the spread of Covid-19 and avoid another nationwide lockdown.
After a slow start to vaccinations, French health authorities reported that a million people had received coronavirus inoculations by Saturday.
But stubbornly high new rates for infections, hospitalisations and Covid deaths fuelled fears France may need another full lockdown, which would be the third, inflicting yet more devastation on businesses and daily lives.
Arrivals to France from European Union countries by air or sea must be able to produce a negative PCR test result obtained in the previous 72 hours.