Germany's coronavirus infection rate has edged up from earlier this month and people should stay at home as much as they can despite a lockdown relaxation last week, the head of the Robert Koch Institute for infectious diseases said on Tuesday.
The virus reproduction rate, dubbed 'R', is now at 1.0 in Germany, said Lothar Wieler, president of the Robert Koch Institute. That means one person with the virus infects one other on average. Earlier this month, the rate was at 0.7.
Wieler urged Germans to practise rigorous social distancing despite a slight easing of restrictions on public life.
Retailers with floor space of up to 800 square metres are now allowed to open, along with car and bicycle dealers, and bookstores, though they must practise strict social distancing and hygiene rules.
German retailers sought on Tuesday to persuade the government to let all stores operate normally from May 4, saying customers had not stormed back into the smaller shops that were allowed to reopen and were behaving prudently.
Wieler said Germany has, compared to other countries, been successful so far in restricting the spread of the virus.
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"Against the background of the easing (of restrictions), let's ensure we can continue to defend this success we have achieved together," he told a regular news conference. "We don't want the number of cases to rise again."
"Let's, insofar as is possible, stay at home, let's stick to the reduced contact."
Academics have suggested public life may gradually return to normal if certain conditions are met, including the 'R' rate, stabilising at a low level.
"The number should stay below one, that is the big goal," Wieler told the news conference.
"The further it is below one, the more secure we can feel, the more leeway we have, but there are other numbers that are also important," he said, adding that these included the number of cases per day, and testing capacity.
Earlier on Tuesday, the institute said Germany's confirmed coronavirus cases increased by 1,144 to 156,337. The death toll rose by 163 to 5,913. On Monday, the data showed confirmed cases up by 1,018, with the death toll rising by 110.
Chancellor Angela Merkel, who will review the restrictions with state leaders on Thursday, urged Germans last week to show endurance and discipline to get through the coronavirus pandemic that she said is "still at the beginning".