Singapore Detects First Two Clade Ib Mpox Cases Linked to Close Physical Contact

Two men in Singapore test positive for mpox clade Ib. Health officials report low public risk and focus on contact tracing and targeted isolation.

By: AXL Media

Published: Apr 2, 2026, 8:38 AM EDT

Source: Information for this report was sourced from The Straits Times

A Mutated Viral Strain Reaches Singaporean Shores

The Communicable Diseases Agency confirmed that two men, aged 30 and 34, have become the first recorded cases of the mpox clade Ib variant in Singapore. According to official reports, both patients are currently in stable condition and have been placed under strict home isolation protocols following their initial medical evaluations. While one patient had no recent travel history, the second individual reported recent international travel and prolonged close contact with the other infected man, suggesting a localized transmission event linked to specific high risk activities.

Tracing the Timeline of Infection and Isolation

Medical records indicate that the first patient began showing symptoms on March 25 and was hospitalized five days later, with laboratory results confirming the clade Ib infection on March 31. The second patient sought care on March 31 after developing symptoms on March 26, receiving a positive diagnosis on April 1. Under the current public health mandate, both men are required to remain in isolation until at least April 20 and 21 respectively, ensuring they remain separated from the community until they are no longer deemed infectious by clinical staff.

Mitigating Risk Through Targeted Contact Tracing

Health officials have launched an intensive contact tracing operation to identify individuals who may have been exposed to the virus through direct or intimate contact with the confirmed cases. The agency has stated that close contacts are being advised to monitor their health closely, while high risk contacts are being offered post exposure vaccinations to prevent the onset of the disease. Despite these new detections, the government maintains that the broader population does not require vaccination at this time, as the virus does not spread easily through casual respiratory interaction.