The number of confirmed coronavirus cases in Germany jumped by more than 100 on Saturday local time, reaching 795 by mid-afternoon amid growing concern at the economic impact of the spreading epidemic on one of the world's most trade-dependent economies.

The number recorded by the Robert Koch Institute stood at 684 in the morning, with large clusters in the west and south, where an initial outbreak centered on a car supplier with a unit in Wuhan, where the infection was first detected.

The total is well over 10 times larger than it was a week ago. There were 66 cases on February 29.

Western Europe's most populous country has the second largest number of registered cases on the continent after Italy.

So far, no deaths have been reported, though the RedaktionsNetzwerk Deutschland newspaper group reported that a transplant patient with a depressed immune system who had contracted coronavirus was in a critical condition.

With concern growing at the vulnerability of long international supply chains to such an epidemic, Ola Kallenius, chief executive of Mercedes maker Daimler, warned against a return to economic nationalism.

"These events show how fragile global supply chains are," he told Der Spiegel magazine in remarks published on Saturday. "But a world without global work sharing would be less successful ... We should protect (that success) while checking for vulnerabilities where we can bring more security into the supply chain.”

He said Daimler was "gradually ramping up" production again in China after the Chinese New Year stoppage, which had been lengthened because of the coronavirus. But the disease would have an impact on company results.

"We can't yet say what the impact will be, but it is clear that both production and sales will be affected," Kallenius added.

Lufthansa, Europe's largest airline group by fleet size, on Friday announced that it was slashing by half the number of flights it will operate in coming weeks as a result of the sudden slackening in demand.

While the government has so far resisted calls for direct economic stimulus to counter the effects of the slowdown, saying only that it has the resources to do so if necessary, more targeted measures are being contemplated.

Handelsblatt newspaper reported on Saturday that the parties in Chancellor Angela Merkel's coalition were discussing ways to make it temporarily easier for companies to shorten employees' working hours by letting them off some of the cost of social security benefits.