Copenhagen: The World Health Organization expressed concern Friday over a coronavirus resurgence in Europe as Britain joined France, Germany and Austria in announcing tighter mask rules and greater testing.
Europe accounts for a fifth of the world's more than 15 million infections and remains the hardest-hit region in terms of deaths, with 207,118 out of more than 630,000 globally since the virus emerged in China late last year.
The WHO's European chapter pointed to rising cases on the continent over the past two weeks, saying tighter measures may be needed to curb the spread.
Europe like other regions is struggling to balance restrictions to halt COVID-19 against the need to revive economies as people there emerge from some of the world's toughest lockdowns.
A three-year-old girl died in Belgium, becoming the country's youngest known coronavirus victim, in a further wake-up call for a continent that has recently lifted shutdowns.
"The recent resurgence in COVID-19 cases in some countries following the easing of physical distancing measures is certainly cause for concern," a WHO-Europe spokeswoman told AFP.
"If the situation demands, reintroduction of stricter, targeted measures with the full engagement of communities may be needed."
In Spain, health authorities are facing worrying outbreaks in Aragon and Catalonia, where officials have reintroduced local restrictions and urged residents in Barcelona and its suburbs to leave home only for essential trips for two weeks.
“We have to monitor what's going on, see where we need to take action and act early," said health ministry official Maria Jose Sierra.
"If the important outbreaks are controlled quickly and if we manage to ensure that there are no (other) outbreaks of such magnitude, we will have a much more contained situation."
French President Emmanuel Macron on Friday met his top ministers to discuss contagion measures, and his prime minister Jean Castex later announced on-the-spot tests would be required for travellers visiting from 16 high-risk countries including the United States.
France has yet to resume general travel to and from these countries so the tests will be for returning French citizens and residents.
Masks are now mandatory on public transport, in shops and enclosed spaces across France and there are fears that the summer holidays could see a spike in cases with people flocking to beaches and tourist spots.
Britain on Friday made it compulsory to wear a face-covering in shopping centres, banks, takeaway outlets, sandwich shops and supermarkets, following the lead of Scotland.
Exceptions have been made, including for children under 11 or people with respiratory problems, but others who refuse to cover their nose and mouth risk a fine of up to 100.
Germany will offer free coronavirus tests to all returning travellers in new measures agreed Friday.
And Austria made face masks mandatory again in supermarkets, food stores, post offices, bank branches and health care facilities along with public transport and pharmacies.
"It was a mistake to lift mandatory mask use so soon," said one shopper, Andreas Poschenreither.