Australian officials reinstated social distancing measures across greater Sydney on Thursday, as they scrambled to find missing transmission links in a COVID-19 case connected to an Indian variant of the virus.
With many people expected to gather over the weekend for annual Mother’s Day celebrations, the New South Wales state government restricted household gatherings to 20 guests and limited aged care facility visitors to two people per resident.
Masks will be mandatory on public transport and at indoor venues. All the restrictions, which cover around 5.3 million people in the country’s biggest metropolitan area, take effect at 5 p.m. local time and are scheduled to last until Monday morning.
“We believe this is a proportionate response to the risk we have ahead of us,” NSW Premier Gladys Berejiklian told reporters.
The measures, which also cover Sydney’s neighboring regions of Wollongong, the Central Coast and Blue Mountains, were spurred by the detection of COVID-19 in a 50-year-old man, who passed the infection to his wife.
The case, the first local transmission in NSW in more than a month, baffled health officials given the man had no known links to high-risk jobs or people.
Testing has determined the man was infected with a variant first detected in India and genomic sequencing had linked the case to a returned traveler from the US, NSW Chief Health Officer Kerry Chant said on Thursday, but there was no clear transmission path between the two people.
“We can’t find any direct link between our case, so what we’re concerned about is there is another person that is as yet unidentified that infected our case,” Chant said.
It appeared to be the first time officials had reported the local transmission of an India virus variant in Australia.
Tests on the infected man had showed a higher viral load than typically seen in infected people, potentially increasing the chance that the man has spread the disease, officials said.
NSW Treasurer Dominic Perrottet entered self-isolation on Thursday after he visited a restaurant at the same time as the infected person, classifying him as a close contact, his office said. Perrottet, who attended a sitting of state parliament on Wednesday, has tested negative.
Authorities also asked thousands of residents in the city’s inner west to seek testing for any mild flu symptoms after fragments of the coronavirus that causes COVID-19 were detected in the sewerage network used by several suburbs.
Speedy tracing systems, movement curbs and border restrictions have largely reined in the spread of COVID-19 in Australia, which has recorded 29,865 cases and 910 deaths since the pandemic began.
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