The World Health Organization has criticised Europe's "unacceptably slow" vaccine roll-out and said the region's surge in coronavirus infections was "worrying".
"Vaccines present our best way out of this pandemic... However, the roll-out of these vaccines is unacceptably slow" and is "prolonging the pandemic", WHO director for Europe Hans Kluge said in a statement.
"We must speed up the process by ramping up manufacturing, reducing barriers to administering vaccines, and using every single vial we have in stock, now," he added.
To date, only 10% of the region's total population have received one vaccine dose, and 4% have completed a full vaccine series, the organisation said.
The WHO's European region comprises 53 countries and territories and includes Russia and several Central Asian nations.
The organisation said the slow roll-out was "prolonging the pandemic" and described Europe's virus situation as "more worrying than we have seen in several months."
Five weeks ago, the weekly number of new cases in Europe had dipped to under one million, but "last week saw increasing transmission of Covid-19 in the majority of countries in the WHO European region, with 1.6 million new cases," it said.
The total number of deaths in Europe "is fast approaching one million and the total number of cases about to surpass 45 million," it said, noting that Europe was the second-most affected region after the Americas.
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The UN body warned that the rapid spread of the virus could increase the risk of the emergence of worrying new variants.
"The likelihood of new variants of concern occurring increases with the rate at which the virus is replicating and spreading, so curbing transmission through basic disease control actions is crucial," Dorit Nitzan, WHO Europe's regional emergency director, said in the statement.
New infections were increasing in every age group except in people aged 80 years and older, as vaccinations of that age group begin to show effect.
The WHO said the variant of the virus first detected in Britain was now the predominant one in Europe, and was present in 50 countries.
"As this variant is more transmissible and can increase the risk of hospitalisation, it has a greater public health impact and additional actions are required to control it," it said.
Those actions included expanded testing, isolation, contact tracing, quarantine and genetic sequencing.
Meanwhile, the WHO said lockdowns "should be avoided by timely and targeted public health interventions", but should be used when the disease "overstretches the ability of health services to care for patients adequately."
It said 27 countries in its European region were in partial or full nationwide lockdown, with 21 imposing nighttime curfews.
Yesterday French President Emmanuel Macron announced he was extending movement restrictions to cover the whole of the country, and said schools would close for three weeks as he sought to pushback a third wave of Covid-19 infections.