Singapore reported its biggest one-day jump in coronavirus infections with 54 new cases, of which 48 were imported, the government said in a statement.

The 48 imported cases had travel histories to Europe, North America and ASEAN, with all except one being returning residents or long-term pass holders, according to the statement.

An additional eight cases have been discharged from hospital, increasing the total to 152 who have fully recovered from the virus. Singapore has so far reported two deaths from the pandemic, both of which were announced on Saturday.

All Singapore citizens, permanent residents and long-term pass holders returning to the city state are being issued a 14-day stay-at-home notice, meaning they have to stay in their place of residence at all times for that period.

The Immigration & Checkpoints Authority earlier on Monday said all travelers must submit an online health declaration before proceeding with immigration clearance.

Nine out of 10 imported Covid-19 cases in Singapore between March 18-20 last week didn’t show symptoms, like fever, when they passed through border checkpoints, the Straits Times reported.

All doctors in public and private hospitals, as well as private specialist clinics, have been advised by the country’s health ministry to immediately halt or defer accepting new foreign patients who don’t live in Singapore, the newspaper said.