But WHO regional director Hans Kluge said at a Thursday news conference that the increase in cases should serve as a warning of what is to come.

"Weekly cases have now exceeded those reported when the pandemic first peaked in Europe in March," Kluge said.

"Last week, the region's weekly tally exceeded 300,000 patients."

More than half of European nations have reported an increase of more than 10% in new cases in the past two weeks, Kluge added.

The September case numbers, however, should serve as a wake-up call for all of us," he said.

"Although these numbers reflect more comprehensive testing, it also shows alarming rates of transmission across the region."

While there was an increase in cases in older age groups, those aged 50 to 79, in the first week of September, Kluge said, the biggest proportion of new cases is still among 25- to 49-year-olds.

Countries across the continent have been easing lockdowns and reopening their economies, but governments are now scrambling to avert further outbreaks.

"This pandemic has taken so much from us," Kluge said, citing the nearly 4.9 million recorded Covid-19 cases in Europe and more than 226,000 deaths.

Hancock stressed the need to take "immediate action" against the virus with winter approaching.

At least 41,773 people have died with coronavirus in the UK, according to JHU, the highest toll in Europe and fifth-largest number of any country in the world.

The UK government has come under pressure over recent failings in its coronavirus testing system, with some people -- including health care workers -- experiencing difficulty in accessing tests or being directed to testing sites far from home.

Prime Minister Boris Johnson defended Britain's coronavirus testing record Wednesday, saying it compared favorably to other European countries and that recent problems were due to a "colossal spike" in demand.

WHO chief: We can fight the virus back again

Authorities in the Spanish capital of Madrid are to announce new coronavirus restrictions on Friday as the country also responds to an uptick in the number of cases.

Spain has now recorded more than 30,000 deaths since the start of the outbreak, with more than 600,000 total cases.

Madrid accounts for approximately a third of all new cases, according to data from the country's health ministry.

The president of Madrid's regional government, Isabel Díaz Ayuso, has suggested that migrant populations are partly to blame.

"(The outbreaks are partly) due to the way of life of Madrid's immigrants and the population density of these districts," she said Tuesday.

"It is a way of life in Madrid."

Meanwhile, German authorities have imposed new restrictions and ordered more testing in a popular Bavarian ski resort after a coronavirus outbreak that has been linked to a US citizen working at a lodge operated by the US Army.

The state prosecution service in Munich said it had launched an investigation into the American who may have caused the surge in cases.

New regulations imposed in the town of Garmisch-Partenkirchen over the weekend mean local bars will now close at 10 p.m.