Though Germany began to lift lockdown measures last week, Merkel has urged caution and slammed growing impatience to shake off the curbs on public life introduced a month ago to slow contagion.
The measures have proved successful so far, with Germany maintaining a mortality rate of just 3.7 percent in the pandemic, far lower than major European neighbours.
The restrictions have also met with public approval. Almost three quarters of the population said they supported them in a Kantar poll published Friday.
In full-blown crisis just a few months ago, Merkel's CDU/CSU conservative alliance has meanwhile rebounded in the polls, jumping ten points in the last two weeks to 38 percent.
'Life and death'
Yet the mood could be about to change.
Wolfgang Schäuble, an elder statesman of German politics and current president of the Bundestag lower house, warned that extended restrictions would impinge on fundamental citizens' rights.
“When I hear that protecting lives should come above everything else, I don't think that is absolutely true,” he told Berlin daily Der Tagesspiegel on Sunday.
Merkel also provoked the ire of regional leaders when she suggested last week that they had been too eager to relax restrictions.
Armin Laschet, state premier for Germany's most populous region North-Rhine Westphalia and a candidate to succeed Merkel as CDU leader, protested that the discussion over how to lift lockdown measures was “appropriate”.
“It is of course still a question of life and death,” he told public broadcaster ARD on Sunday night.
Yet he insisted that the negative effects of lockdown must also be “weighed up”, pointing in particular to children “who have had to stay at home for the last six weeks”.
Angela Merkel and Armin Laschet at a CDU event in February 2020. Photo: DPA
He also attacked what he saw as the pessimistic predictions of some medical experts, pointing out that “40 percent of intensive care beds are empty” in his state.
Germany's most popular newspaper Bild echoed Laschet's words in a scathing editorial on Monday, accusing Merkel of being “stubborn, pig-headed and bossy”.
'End of national unity'
Largely muted in the crisis until now, Germany's opposition parties are also beginning to grow more critical of the government's course.
The Greens, still the highest polling opposition party despite a recent slump, have urged more caution. On Sunday, co-leader Annalena Baerbock slammed plans to allow Bundesliga football to resume without spectators from next month.
The leader of the liberal FDP Christian Lindner warned that consensus over coronavirus measures was breaking down, declaring the “end of national unity”.
His party's concern over both the fate of small and medium-sized businesses, as well as the erosion of civil liberties, is also shared by more extreme groups.
Far left and far right protesters have assembled in Berlin every Saturday in recent weeks, calling for “democratic resistance” against what they claim are authoritarian and unconstitutional coronavirus restrictions.
Police arrested around 100 of an estimated 1,000 protesters last Saturday and a further demonstration is planned for May 1st.
The far-right AfD, Germany's largest opposition party by number of MPs, has also declared its opposition to lockdown.
“The absolute shutdown was avoidable and (the government) is now missing a chance to end it,” claimed AfD lawmaker Sebastian Münzenmaier, adding that “all shops must be opened: give the people back their liberty!”.
Weekly newspaper Die Zeit warned the AfD could “profit from the long term consequences” of the virus such as mass unemployment.