(Bloomberg) -- Singapore is returning to the lockdown-like conditions it last imposed a year ago, banning dining-in and limiting gatherings to two people, as a rising number of untraceable virus infections pressures one of the most successful places in the world at Covid containment.For four weeks from May 16 to June 13, gathering sizes as well as household visitors will be cut to a maximum of two people from five people now, working from home will be the default, and food places can only do takeaways and deliveries, the health ministry said in a statement on Friday. The resurgence is also putting a highly-anticipated travel bubble with Hong Kong in doubt. “A pattern of local unlinked community cases has emerged and is persisting,” the statement said. “We need to act decisively to contain these risks as any one leak could result in an uncontrolled resurgence of cases.”The number of new cases in the community has increased to 71 in the past week from 48 in the week before, the health ministry said Thursday, while the number of unlinked infections -- the most concerning to officials as they signal undetected spread in the community -- has risen to 15 in the past week from 7 in the week before.While the numbers are far smaller than ongoing outbreaks in countries like the U.S. that are charging ahead with opening up, the flareup is a major setback by Singapore standards, as the city-state is one of handful of “Covid havens” that had previously nearly eliminated the pathogen domestically. These places are now struggling to find a path to re-open as their vaccination drives lag major western economies.‘Covid Zero’ Havens Find Reopening Harder Than Taming Virus The return to near-lockdown in Singapore puts in doubt high-profile global initiatives meant to showcase its control of the virus. An long-gestating air travel bubble with Hong Kong, set to start May 26, is now unlikely to go ahead on schedule. Singapore was also scheduled to host the Shangri-La Dialogue early next month and the Davos-based World Economic Forum in August.The new rules Singapore will have for the next month include:Fewer people allowed in shopping malls and showroomsA maximum of 100 people allowed at business meetings and live performances with pre-event testing, and up to 50 people without such testingOperating capacity at attractions cut to 25% from the current permissible capacity of 50%Wedding receptions will not be allowedHong Kong Travel BubbleOfficials in both cities have signaled that the highly anticipated bubble, first scheduled to start last November, will be delayed again in light of the outbreak in Singapore.Transport minister Ong Ye Kung said at a Friday briefing that it’s very likely that Singapore “may not meet the criteria” for the arrangements to go through; the government will make an announcement early next week on the bubble’s fate after reviewing local cases.According to the terms of the agreement, the travel bubble will be closed for two weeks if the seven-day moving average of the daily number of unlinked local cases is more than five in either city. It’s currently just above 2 in Singapore and near zero in Hong Kong.There’s a “high chance” the air travel bubble may not go ahead as scheduled, Hong Kong Secretary for Commerce and Economic Development Edward Yau said Friday, citing Singapore authorities. Yau said he will speak to Singapore’s new transport minister S. Iswaran early next week.Read more: Hong Kong-Singapore Travel Bubble in Doubt as Covid SpreadsJob SupportGiven the new ban on dining-in, the Singapore government will increase job support subsidies for food and beverage firms as well as waive rental for one month for hawker stall and coffee shop tenants.It is also stepping up virus testing from May 15, and will start using rapid test kits for people with symptoms at health centers.On Thursday, the number of new local cases rose to 24, the highest since July last year. Changi Airport is now the single biggest cluster of Covid cases, with 46 linked to the aerodrome, raising fears that travelers have spread the pathogen to airport staff despite strict post-arrival quarantine regulations.The government closed the airport terminals and connecting Jewel shopping mall to the public for two weeks from May 13, though it remains open for air travel. It has also been testing workers in the facilities.For more articles like this, please visit us at bloomberg.comSubscribe now to stay ahead with the most trusted business news source.©2021 Bloomberg L.P.