Chile said Saturday it had found its first case of the Omicron variant of Covid-19 in a traveller who arrived late last month from Ghana.
The traveler had provided proof of a negative PCR test, but an additional mandatory test upon arrival at the airport proved positive, health authorities in the Valparaíso region said in a statement.
They said the passenger, who was not identified, had had two rounds of Pfizer vaccine and appeared in good health. The person has been in isolation since arriving.
Other passengers on the same flight are being retested.
Covid-19 has claimed more than 38,000 lives in Chile to date.
Rio cancels NYE celebrations
Rio de Janeiro has decided "with sadness" to cancel its huge New Year's celebration amid rising concerns over the spread of the new variant. The move also raises doubts about the city's iconic Carnival in February.
"We are going to cancel the official celebration of the New Year's party in Rio," Mayor Eduardo Paes announced Saturday on Twitter.
He added the decision was made "with sadness," but in view of the rapid spread of Omicron. Six cases of the variant have been confirmed in Brazil to date.
The decision followed intensive debate between city officials and Brazilian health experts, with Omicron arriving after months in which the virus situation in the country had been substantially improving.
But in the end, Paes said, "Let us respect science" and take a cautious approach.
More than 20 other Brazilian cities, including populous São Paulo, have already cancelled year-end festivities.
On Thursday, Paes said people would now need Covid-19 vaccination certificates to enter beauty salons, restaurants, bars and hotels. They were previously required in cinemas, theatres, gyms, museums and sports stadiums.
The city's New Year's festivities, involving joyous dance music and extravagant fireworks displays, typically bring some three million people to famed Copacabana beach.
But even without the fireworks, Paes later told reporters, "the city remains magical, incredible, welcoming," and "vaccinated tourists will be very welcome."
He also sought to project optimism about the Carnival, noting that it is still three months away.
In the meantime, Rio's famous samba schools are continuing the work of preparing – practicing dance moves, preparing floats and creating exotic costumes.
Covid-19 has claimed more than 615,000 lives in Brazil – trailing only the United States.