French people should start wearing masks again in crowded areas, especially on public transport, as France has to deal with a new wave of Covid-19 infections fuelled by new variants of the disease, Health Minister Brigitte Bourguignon said on Monday.

"I'm not saying it should be mandatory, but I do ask the French people to put the mask on in public transport," she told RTL, adding that it was a "civic duty" to do so.

"I'm not merely advising it, I'm asking for it," adding that face masks should also be worn again in other closed areas, such as workplaces or shops.

France reported new 17,601 coronavirus infections over the past 24 hours, the highest figure for a Monday since April 18.

Five days ago, French vaccination chief Alain Fischer confirmed the country was in the midst of a new Covid-19 wave, like other European countries, adding then he was personally in favour of reinstating mandatory face mask-wearing on public transport.

New infections have been steadily rising since the end of May in France, with the seven-day moving average of daily new cases more than quadrupling between the May 27 figure of 17,705 and Monday's 71,018.

That total is still, nonetheless, five times lower than the 366,179 records at the start of the year.

The number of people hospitalised for the disease fell to a six-month low of 13,876 on June 18 but it has since increased by 1,223 to 15,099, a four-week high.

There is traditionally a two-week delay between cases and hospitalisation trends and then a similar delay regarding Covid-19 deaths.

France's Covid-19 death toll rose by 48 over 24 hours today, to 149,406.

- Reuters