Unvaccinated people in Germany are to be excluded from non-essential stores, cultural and recreational venues, Chancellor Angela Merkel has said.
In addition, parliament will consider making coronavirus jabs mandatory from February as the country battles rising cases.
About 68.7% of the population in Germany is fully vaccinated, far below the 75% minimum ministers are aiming for.
The effort to get jabs into more arms will be boosted by adding dentists and pharmacists to those administering them.
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Speaking after a meeting with federal and state leaders, Mrs Merkel said the measures were necessary amid concern hospitals could be overwhelmed.
Some hospitals in the south and east have transferred patients to other parts of Germany because of a shortage of intensive care beds.
The new Omicron variant is adding to health officials’ worries.
Mrs Merkel said she was “depressed” by the strength of the fourth wave of infections in the country, adding she had been hoping a voluntary approach to immunisation would be more effective.
The situation regarding COVID in Germany is “very serious”, she added, describing the new measures as an “act of national solidarity”.
“The fourth wave must be broken and this has not yet been achieved,” she said.
More than 73,000 new infections were reported on Thursday, along with 388 deaths.
Mrs Merkel is likely to have left office by February, and mandatory jabs will need to be debated in the Bundestag, following guidance from Germany’s Ethics Council.
She said she would vote in favour were she still a member of parliament.
Finance Minister Olaf Scholz – who is expected to be elected as Mrs Merkel’s successor next week – has also backed the idea, as do most Germans, according to opinion polls.
“If we had a higher vaccination rate, we wouldn’t be discussing this now,” Mr Scholz said.
The new measures regarding shops and other venues are likely to come into effect in the coming days, once Germany’s 16 states have incorporated them into existing rules.