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Official confirmation from WHO of the first case of mpox outside of Africa

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  • Mpox is a viral illness caused by the monkeypox virus, characterized by symptoms such as fever, swollen lymph nodes, and a distinctive rash.
  • The recent emergence of a new strain, Clade 1b, has prompted WHO to declare mpox a public health emergency of international concern.
  • Effective prevention and control measures include vaccination, improved surveillance, and equitable access to healthcare resources.

Mpox, formerly known as monkeypox, has emerged as a significant global health concern, particularly with the recent confirmation of its first case outside Africa. This development has prompted the World Health Organization (WHO) to declare it a public health emergency of international concern, emphasizing the need for a coordinated international response to curb its spread and mitigate its impact.

Mpox is a viral illness caused by the monkeypox virus, a member of the Orthopoxvirus genus, which also includes the variola virus responsible for smallpox. The disease is characterized by symptoms such as fever, swollen lymph nodes, and a distinctive rash that progresses through several stages before healing. The rash can appear on various parts of the body, including the face, palms, soles, and genital areas, and may be painful or itchy.

The virus is primarily transmitted through direct contact with the bodily fluids, lesions, or respiratory droplets of an infected person. It can also spread through contact with contaminated materials, such as bedding or clothing, and from animals to humans, particularly in regions where the virus is endemic.

Recent Developments and Global Spread

The recent case of mpox outside Africa marks a significant moment in the global spread of the disease. According to WHO Director-General Dr. Tedros Adhanom Ghebreyesus, the emergence of a new clade of mpox, its rapid spread in the Democratic Republic of the Congo (DRC), and the detection of cases in neighboring countries are particularly concerning. "The emergence of a new clade of mpox, its rapid spread in eastern DRC, and the reporting of cases in several neighboring countries are very worrying," Dr. Tedros stated.

This new strain, Clade 1b, has shown novel mutations and is believed to have emerged around mid-September 2023. It has been associated with a higher case fatality rate compared to previous strains, prompting urgent calls for action and international collaboration to prevent further outbreaks.

Symptoms and Diagnosis

Mpox symptoms typically appear within 7 to 14 days after exposure, but they can take up to 21 days to manifest. Initial symptoms resemble those of the flu, including fever, headache, muscle aches, and swollen lymph nodes. The distinctive rash usually develops a few days after the onset of these symptoms, progressing from flat red spots to pustules and eventually scabbing over.

Diagnosing mpox can be challenging due to its similarity to other diseases such as chickenpox and measles. Laboratory confirmation is essential, with polymerase chain reaction (PCR) testing of samples from skin lesions being the preferred method.

Treatment and Prevention

While most cases of mpox are mild and resolve within a few weeks, severe cases can occur, particularly in young children, pregnant individuals, and those with weakened immune systems. Treatment primarily focuses on managing symptoms and preventing complications. Antiviral medications, such as tecovirimat, have been used in severe cases, and supportive care is crucial for recovery.

Vaccination plays a vital role in preventing mpox. The smallpox vaccine offers some protection against mpox, and WHO recommends vaccination for high-risk groups, including healthcare workers and individuals with multiple sexual partners. Pre-exposure vaccination is considered more effective than post-exposure vaccination.

Global Response and Challenges

The declaration of mpox as a public health emergency of international concern underscores the need for a robust global response. This includes scaling up vaccination efforts, improving surveillance and diagnostic capabilities, and ensuring equitable access to healthcare resources. As Professor Michael Marks from the London School of Hygiene & Tropical Medicine noted, "The best available evidence supports a need for pre-exposure vaccination, where people at risk are vaccinated before they come into contact with a case".

Despite these efforts, significant challenges remain, particularly in resource-limited settings. The epicenter of the current outbreak in South Kivu, DRC, is experiencing a humanitarian crisis, complicating efforts to implement effective surveillance, testing, and case management strategies.

Mpox represents a growing threat to global health, necessitating a coordinated international response to prevent further spread and protect vulnerable populations. By enhancing vaccination efforts, improving diagnostic capabilities, and ensuring equitable access to healthcare resources, the global community can work together to mitigate the impact of this emerging infectious disease. As the situation evolves, continued vigilance and collaboration will be essential to prevent future outbreaks and safeguard public health worldwide.


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