LISBON, Portugal — Portugal is entering a so-called state of calamity -- the second this year -- to curve an upward trend in coronavirus infections despite having one of the strongest vaccination records in Europe.

The state of calamity is one step below the country’s top level of alert.

The country is tightening passenger control in airports, seaports and land borders, requiring negative coronavirus tests for most incoming visitors as part of the new set of rules that kick in Wednesday.

Face masks are again required in enclosed spaces and coronavirus vaccination or COVID-19 recovery tests are required to enter restaurants, cinemas, gyms and hotels.

Experts believe that Portugal’s vaccination rate, which at 87% of over 10 million residents is one of the highest globally, has shielded the country from the infection spikes experienced by northern European countries recently.

Still, hospitalizations have been rising since September. Authorities on Tuesday recorded 2,907 new infections on Tuesday, with 833 people in hospital, 116 in intensive care units and 15 deaths.

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HERE’S WHAT YOU NEED TO KNOW TODAY ABOUT THE CORONAVIRUS PANDEMIC:

— U.S. moves to toughen testing requirement for travelers

— Nigeria detects first case of omicron from an October sample, weeks before South Africa alerted the world about the variant

— Japan starts booster COVID vaccinations amid omicron scare

— Austrian lockdown extended through Dec 11 as planned

Go to https://APNews.com/coronavirus-pandemic for updates throughout the day.

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HERE’S WHAT ELSE IS HAPPENING TODAY:

DUBAI, United Arab Emirates — Saudi Arabia said it detected its first case of the new coronavirus variant omicron.

The kingdom’s state-run Saudi Press Agency said the case came from a citizen coming from what it described as a “North African country.”

The report said the infected individual and his close contacts had been quarantined.

The case marks the first-known instance of omicron being detected among Gulf Arab nations.

Much remains unknown about the new variant, which has been identified in more than 20 countries, including whether it is more contagious, whether it makes people more seriously ill, and whether it can thwart the vaccine.

Dr. Anthony Fauci, the top U.S. infectious disease expert, said more would be known about the omicron strain in two to four weeks as scientists grow and test lab samples of the virus.

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COPENHAGEN, Denmark — Health officials say a concertgoer who attended a gig in northern Denmark with a local DJ has tested positive for the new coronavirus variant omicron.

The concert was attended by nearly 2,000 people on Saturday in Aalborg. The Danish Patient Safety Authority has urged all those who attended the event to be tested, Danish broadcaster DR said Wednesday.

Statens Serum Institut, another government agency that maps the spread of COVID-19 in Denmark, said Tuesday that four cases of omicron had been reported in the Scandinavian country. It was not immediately clear if the concertgoer was included or if it was a new case.

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TOKYO — Japan has asked international airlines to stop taking new reservations for all flights arriving in the country until the end of December in a further tightening of already strict border controls.

The transportation ministry says the request is an emergency precaution.

The move by the world’s third largest economy, coupled with its recent return to a ban on foreign visitors, is among the most stringent anywhere, and more in line with cloistered neighbor China than with some other democracies in the region.

It comes as scientists work frantically to determine just how threatening omicron is.

Japan has confirmed a second case of the omicron variant in a person who arrived from Peru, one day after it reported its first case in a Namibian diplomat.