Hong Kong's 23-day streak without a case of local coronavirus transmission has come to an end, reflecting the challenge of eradicating a virus that can spread undetected through carriers with no symptoms.
The case of a 66-year-old woman with no recent travel history becoming infected, confirmed by the government in a briefing yesterday, dashed hope that the city had successfully contained the virus after nearly four months of school closures and social distancing measures.
Her five-year-old granddaughter has also been confirmed to be infected, while six other family members have displayed symptoms and are now in isolation in hospital, said Dr Chuang Shuk-kwan, head of the health department's communicable diseases branch.
The woman, who lives in Tsuen Wan, first developed a fever last Friday and tested positive on Tuesday, Dr Chuang said.
Officials do not know yet how she got infected.
The emergence of hidden local transmission chains is a setback to the government's plan to reopen schools and loosen border restrictions with mainland China as cases dwindled.
After months of social distancing measures, Hong Kong was on the verge of reverting to normal life.
Instead, the Asian financial hub now faces a potential resurgence of cases as it was unclear how several people the woman came into contact with before her infection was identified.
Health officials are testing all residents in both housing blocks that the woman visited, said Dr Chuang.
Besides the woman and her granddaughter, a third case of a traveller returning from Pakistan was also reported yesterday.
That brought the total number of confirmed cases in the city to 1,050.
ECONOMIC, SOCIAL NEEDS CRITICAL
If the goal is just to eradicate the virus, then Hong Kong should go back into shutdown mode. However, it is about the virus against the backdrop of the economic and social needs of the community, and for that reason this one case is unlikely to prevent the restarting of Hong Kong.
ASSOCIATE PROFESSOR NICHOLAS THOMAS, from the City University of Hong Kong.
"This is the challenge of Covid-19, the fact that so several cases are asymptomatic," said Associate Professor Nicholas Thomas from the City University of Hong Kong.
"Even though there have been no cases for nearly three weeks, that doesn't mean that the virus is not in circulation. This is a problem not just for Hong Kong, however, for all countries as they seek to move out of lockdown and restart their economies."
The resurgence of cases will complicate the political debate in Hong Kong on how quickly social distancing measures should be eased.
While Hong Kong Chief Executive Carrie Lam's administration eased limits on social gatherings to eight people earlier this month, the rule has come under pressure for being arbitrarily designed to forestall street protests, which have re-emerged.
Separately, Hong Kong's education chief said yesterday that the government would not push back the reopening of schools, currently slated to restart on May 27.
Dr Thomas, who has edited an academic book series titled Health Security And Goverce, said: "If the goal is just to eradicate the virus, then Hong Kong should go back into shutdown mode."
He added: "However, it is about the virus against the backdrop of the economic and social needs of the community, and for that reason this one case is unlikely to prevent the restarting of Hong Kong."
Hong Kong has been lauded for reacting quickly to Covid-19, which kept its outbreak small despite its proximity to mainland China.
Several of its moves were made as early as Januarynearly universal mask-wearing and the closure of schools and officesand have since been adopted globally as the pandemic widened.
BLOOMBERG