While much of the world has shifted focus away from pandemic-level alerts, the emergence and spread of a new strain of mpox, called Clade Ib, has triggered renewed concern. The World Health Organization (WHO) declared the outbreak a public health emergency of international concern (PHEIC) in August 2024. Although in September 2025 the WHO announced that the emergency status was lifted, the outbreak remains a serious concern.
Mpox is a viral zoonotic disease, meaning it is transmitted from animals to humans. It causes flu-like symptoms and often a skin rash or lesions. The new Clade Ib variant is believed to be more transmissible and has been spreading primarily in central African countries, especially the Democratic Republic of the Congo (DRC).
Since early 2024, more than 21,000 confirmed cases and about 70 deaths have been reported, mostly in the DRC, with travel-related cases appearing in countries such as Thailand and the United Kingdom.
Several factors make this outbreak particularly concerning:
Rapid spread: The Clade Ib form appears to spread more quickly through close contact and possibly through new transmission routes.
Weak health systems: Many affected regions have limited laboratory capacity, surveillance, and healthcare resources. Violence and poor infrastructure in parts of the DRC have made containment efforts difficult.
Potential for international spread: Although most cases remain in Africa, travel-linked infections have been reported in other countries, raising global concern.
Higher risk for vulnerable groups: Children, pregnant women, and people with compromised immune systems are more likely to suffer severe outcomes.
In February 2025, the WHO confirmed that the mpox outbreak was still a public health emergency due to rising cases and wider geographic spread. By September 2025, however, the organization announced that the emergency status had been downgraded as cases began to decline.
Despite this improvement, health officials warned that vigilance is still necessary. The WHO emphasized that the world must not lose focus and that continued investment is needed to support outbreak response, especially in the hardest-hit African regions.
The mpox emergency offers important lessons for global health:
Surveillance and detection: The outbreak shows how quickly lesser-known zoonotic diseases can become global threats when new strains emerge.
Equity in healthcare: The heaviest burden falls on low-income regions. Addressing this requires stronger global support for local health infrastructure.
Preparedness for spillover diseases: The mpox outbreak highlights the constant risk of diseases jumping from animals to humans.
Public awareness: Because mpox spreads through close contact, effective communication and education are crucial to prevent misinformation and reduce stigma.
To prevent the outbreak from resurging, public health authorities and governments must continue to take key actions:
Strengthen case detection and contact tracing to quickly isolate infections and reduce spread.
Ensure vaccine and treatment access for vulnerable populations in affected areas.
Invest in local health systems to build laboratory capacity and improve surveillance.
Maintain global alertness to quickly identify and respond to new outbreaks.
Promote public education and community engagement to encourage prevention and early reporting of symptoms.
The mpox Clade Ib outbreak serves as a reminder that infectious diseases continue to evolve and threaten public health. Although the emergency label has been lifted, the risk has not disappeared. Continued vigilance, investment, and cooperation are essential to prevent future flare-ups.
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