New mpox strain identified in England

摘要

UKHSA detects the first case of clade Ib mpox in England and reminds eligible groups to come forward for mpox vaccination.

詳細內容

UKHSA reminds eligible groups to come forward for mpox vaccination following detection of the first case of clade Ib mpox in England. This represents a new strain variant entering the UK for the first time.

Mpox clades explained:

Clade I (formerly Central African/Congo Basin): More severe disease, higher mortality
- Clade Ib: Recently emerged subclade, associated with 2024 outbreaks in DRC and East Africa
Clade II (formerly West African): Generally milder, associated with 2022 global outbreak

Clade Ib significance:

Higher severity: More serious disease than clade II
Different transmission patterns: May include heterosexual transmission networks
Geographic spread: Recently spread from DRC to neighboring countries
WHO concern: Declared Public Health Emergency of International Concern (PHEIC) in 2024

Case detection:

First clade Ib mpox case identified in England
Likely travel-associated (imported case)
Contact tracing initiated
Risk to general population remains low

Mpox symptoms:

Rash (often starting on genitals, face, or extremities)
Fever
Swollen lymph nodes
Headache, muscle aches, exhaustion
Lesions progress through stages (macules → papules → vesicles → pustules → scabs)

Vaccination program:

Eligible groups:
- Gay, bisexual, and other men who have sex with men (GBMSM) at higher risk
- Healthcare workers in specialist settings
- Contacts of confirmed cases (post-exposure prophylaxis)
Vaccine: Modified vaccinia Ankara (MVA-BN, Imvanex/Jynneos)
Schedule: Two doses for optimal protection

Public health message: UKHSA emphasizes that eligible individuals should not delay vaccination. While this clade Ib detection is significant for surveillance purposes, the vaccination program and public health measures remain effective against all mpox clades.

Risk assessment:

General population risk remains low
Higher-risk groups should ensure vaccination
Anyone with unexplained rash and relevant exposure should seek medical attention
Healthcare providers should maintain awareness for early detection

摘要

詳細內容

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