SINGAPORE - Testing operations for Block 559 Pasir Ris Street 51 have been completed, with 285 residents and visitors to the building having been swabbed as at noon on Monday (May 24), said the Ministry of Health (MOH). An MOH spokesman said in an update on Monday evening that 188 people in the affected block have tested negative for Covid-19, while test results for the remaining 97 are pending. "So far, no one has tested positive for Covid-19," she added. MOH and the Ministry of National Development said on Sunday that the authorities would conduct mandatory polymerase chain reaction testing at the block after four Covid-19 cases were detected in two different households there.