Wuhan, the epicentre of the novel coronavirus outbreak in China, reported on Monday its first cluster of infections since a lockdown on the central Chinese city was lifted a month ago, stoking concerns of a wider resurgence of the disease.
The new infections sounded a note of caution amid efforts to ease coronavirus-related restrictions across China as businesses restart and individuals go back to work.
Wuhan reported five new confirmed cases, all of whom live in the same residential compound. One of them was the wife of an 89-year-old male patient reported a day earlier in the first confirmed case in the city in more than a month.
“At present, the task of epidemic prevention and control in the city is still very heavy,” said the Wuhan Health Authority in a statement. “We must resolutely contain the risk of a rebound.”
All of the latest confirmed cases were previously classified as asymptomatic, people who test positive for the virus and are capable of infecting others but do not show clinical signs such as a fever.
The number of asymptomatic cases in China is not known, as they only appear on the radar of health officials when they show up positive during tests conducted as part of contact tracing and health checks.
China does not include asymptomatic cases in its overall tally of confirmed cases, currently at 82,918, until they exhibit signs of infection. Mainland China has reported 4,633 deaths.
Hundreds of asymptomatic cases in Wuhan, which was released on April 8 from a months-long lockdown, are currently being monitored, according to the city’s Health Authority.
The number of new cases reported in China since April have been small compared with the thousands confirmed each day in February, thanks to a nationwide regime of screening, testing and quarantine.
The government said on Friday that China will gradually re-open cinemas, museums and other recreational venues, though restrictions including mandatory reservations and a limit on numbers will be in place.
Shanghai has already re-opened some night entertainment venues such as discotheques. Walt Disney Co on Monday re-opened its Shanghai Disneyland park to a reduced number of visitors.
New outbreaks in China in the past two months have mainly developed in residential compounds or at hospitals.