Mpox, is a viral zoonotic disease that can be transmitted from animals to humans. it has emerged as a significant public health issue, particularly in regions where the virus is not endemic.
The deadly disease was first identified in 1958 in laboratory monkeys, which led to its initial name “monkeypox,” the disease is caused by the mpox virus, a member of the Orthopoxvirus genus. This genus also includes the viruses responsible for smallpox and cowpox, making mpox a potentially serious threat.
Symptoms and Progression
Mpox typically begins with flu-like symptoms such as fever, headache, muscle aches, back pain, chills, and exhaustion. Within one to three days of the onset of fever, a distinctive rash develops, often starting on the face before spreading to other parts of the body. This rash progresses through several stages, from macules (flat, discolored areas) to papules (raised bumps), vesicles (small blisters), pustules (pus-filled lesions), and finally scabs, which eventually fall off. A key distinguishing feature of mpox is lymphadenopathy, or swollen lymph nodes, which occurs early in the course of the disease and helps differentiate it from similar illnesses like smallpox.
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Transmission and Spread
Transmission of mpox can occur from animals to humans through direct contact with the blood, bodily fluids, or skin lesions of infected animals. Rodents and primates in Africa are considered the primary carriers of the virus. Human-to-human transmission is also possible through close contact with respiratory secretions, skin lesions, or recently contaminated objects. Prolonged face-to-face interaction and intimate physical contact, including sexual contact, can lead to the spread of the virus. Additionally, handling clothing, bedding, or other materials used by an infected person poses a risk of transmission.
Diagnosis and Treatment
The incubation period for mpox, the time between exposure and the onset of symptoms, typically ranges from 6 to 13 days but can extend from 5 to 21 days. Diagnosis is based on the characteristic rash, a history of possible exposure, and laboratory testing, including PCR (polymerase chain reaction) testing of samples taken from skin lesions.
Currently, there is no specific treatment approved for mpox. However, supportive care—such as hydration, pain management, and treatment of secondary infections—is essential. In certain cases, antiviral drugs developed for smallpox, like tecovirimat (TPOXX), may be used.
Prevention and Public Health Measures
Prevention of mpox includes vaccination, avoiding contact with potential animal carriers, practicing good hygiene, and using protective equipment when caring for infected individuals. The Jynneos vaccine, also known as Imvamune or Imvanex, is FDA-approved for preventing both smallpox and mpox. It is recommended for people exposed to the virus or at high risk of exposure. Public health measures, including isolating infected individuals, tracing contacts, and using personal protective equipment (PPE), are crucial for controlling outbreaks.
Risk Factors and Global Health Concerns
Those at higher risk for mpox include people living in or traveling to areas where the disease is endemic, primarily Central and West Africa, as well as individuals with close contact with infected animals or humans. People with weakened immune systems are also at greater risk.
Mpox has gained attention as a global health concern due to sporadic outbreaks outside of Africa. The Africa Centres for Disease Control and Prevention (Africa CDC) recently declared mpox a public health emergency of continental security, highlighting the urgent need for coordinated efforts to prevent its spread. The limited availability of vaccines and treatments further complicates the situation, making public health surveillance and prevention strategies critical.
Public health agencies around the world continue to monitor the situation closely, providing guidance on how to prevent and control the disease as cases continue to emerge globally.