Singapore Communicable Diseases Agency (CDA) confirmed two cases of locally transmitted mpox Cla

Grounds assessments

activeCalifornia CDPH will issue a formal mpox Clade I cluster alert or public health emergency with ≥10 confirmed cases by 2026-07-19, based on CDPH messaging shift to statewide surge framing within 72h of the Apr 16 SF index case.60%activeAt least one confirmed Clade Ib case in the United States linked to the Mexico-US border corridor (distinct from the San Francisco Clade I case) within 90 days, based on Mexico's confirmed Clade Ib Jan 2026, high-volume cross-border movement, and CDC diagnostic pause creating federal detection gaps.40%activeA locally-acquired Clade I mpox transmission chain (≥2 epidemiologically linked cases without African travel history) will be confirmed in North America within 90 days of the San Francisco Clade I detection (Apr 19 2026).40%activePakistan (Khairpur/Sindh) mpox cases will be genomically confirmed as Clade Ib by WHO DON or Pakistan MoH by June 2026, representing the third non-African Clade Ib community transmission geography after Spain (Dec 2025) and Singapore (Apr 2026), based on infant mortality in Khairpur district (7 infants dead/positive, Apr 2026) and demographic severity patterns consistent with Clade Ib rather than Clade IIb.40%activeAt least one confirmed mpox Clade Ib case with travel linkage to Singapore will be detected in Japan, South Korea, or Australia by October 2026, given Singapore's confirmed local Clade Ib transmission (2 cases, CDA Apr 4 2026) and Singapore's role as the primary aviation hub for East Asia–Pacific travel.50%resolvedAt least one confirmed mpox Clade IIb case linked to Singapore will be detected in Japan, South Korea, or Australia by October 2026, given Singapore's confirmation of local Clade IIb transmission (Apr 14 2026) and its role as the primary aviation hub for East Asia–Pacific travel.50%resolvedMpox clade Ib will be confirmed in at least 2 East African countries outside the DRC by April 2026.90%activeAt least one Asian country outside Africa will report sustained community Clade Ib transmission (≥3 locally acquired cases in ≥2 distinct chains) confirmed by WHO DON or national health authority by end of 2027, based on the documented non-African Clade Ib emergence pattern: Spain Dec 2025, Singapore Apr 2026, Pakistan cluster under investigation Apr 2026 — three geographies in 5 months demonstrating Clade Ib fitness outside its endemic African zone.50%

Evidence content

Singapore Communicable Diseases Agency (CDA) confirmed two cases of locally transmitted mpox Cla — research event update (updated 2026-04-14T11:09)

Singapore Communicable Diseases Agency (CDA) confirmed two cases of locally transmitted mpox Cla

Field	Value
date	2026-04-14
event_type	news
headline	Singapore Communicable Diseases Agency (CDA) confirmed two cases of locally transmitted mpox Cla
research_domain	generic
scope	mpox
source_meta	{"sourceId":"cda.gov.sg","name":"Singapore CDA","tier":"T1","url":"https://www.cda.gov.sg","documentUrl":"https://www.cda.gov.sg/news-and-events/two-confirmed-cases-of-locally-transmitted-mpox-clade-ib-infection/","documentTitle":"Two confirmed cases of locally transmitted mpox clade Ib infection","publishedAt":"2026-04-04T00:00:00.000Z","signalClass":"case_report","pathogens":["mpox"],"places":["Singapore"],"country":"Singapore","canonicalPlaceIds":["singapore"],"lineages":["Ib"],"counts":{"cases":2},"certainty":"confirmed"}
source_url	https://www.cda.gov.sg/news-and-events/two-confirmed-cases-of-locally-transmitted-mpox-clade-ib-infection/
summary	Singapore Communicable Diseases Agency (CDA) confirmed two cases of locally transmitted mpox Clade Ib infection, reported approximately April 2-4, 2026. This represents the first documented local transmission of Clade Ib in Singapore. The cases were identified as locally transmitted, meaning they were not imported travel-associated cases. Singapore is the first Southeast Asian country outside Cambodia to document local Clade Ib transmission. This is distinct from the Cambodia Clade IIb C.1 outbreak in Phnom Penh — Singapore's cases are Clade Ib, the more virulent strain responsible for the 2024-2026 PHEIC. Source: Singapore CDA official notice, published approximately April 2-4 2026.

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