In September, 2017, human monkeypox re-emerged in Nigeria, 39 years after the last reported case. We aimed to describe the clinical and epidemiological features of the 2017–18 human monkeypox outbreak in Nigeria.

A erradicação da varíola humana (mpox em inglês) foi certificada em 1980. A varíola símia (mpox em inglês) é endêmica nos países da África Central e Ocidental desde ...-to-highlight medbox">a sua primeira detecção, em 1958. Trata-se de uma zoonose cujos casos geralmente ocorrem perto de florestas tropicais, onde diversos animais são portadores do ortopoxvírus causador da doença. A maioria das infecções em seres humanos pelo vírus da varíola símia em países onde a doença é endêmica é resultado de transmissão primária de animais para humanos. A transmissão de pessoa a pessoa pode ocorrer por meio de contato próximo com secreções respiratórias ou lesões cutâneas de uma pessoa infectada ou com objetos recém-contaminados. A transmissão também pode ocorrer através da placenta da mãe para o feto ou por contato direto durante ou após o parto. Até 21 de maio de 2022, 12 países onde não há varíola símia endêmica, em 2 regiões da Organização Mundial da Saúde (OMS), haviam notificado 92 casos confirmados da doença. Até 26 de agosto de 2022, 96 países sem endemicidade, de todas as 6 regiões da OMS, haviam notificado 45.198 casos confirmados de varíola símia, incluindo 6 óbitos. No mesmo período, os países onde a doença é endêmica notificaram 350 casos confirmados e 6 óbitos. Na Região das Américas, 29 países e territórios notificaram 23.479 (48%) casos confirmados e 3 óbitos. Diversos estudos observacionais sobre as vacinas de primeira geração demonstraram que a eficácia da vacinação contra a varíola humana na prevenção da varíola símia é de aproximadamente 85%. Atualmente, as vacinas originais (de primeira geração) contra a varíola humana não estão mais disponíveis. more

In a retrospective review of hospital records of 40 human monkeypox cases from Nigeria, the majority developed fever and self-limiting vesiculopustular skin eruptions. Five deaths were reported. Compared to human immunodeficiency virus (HIV)–nega...tive cases, HIV type 1–coinfected cases had more prolonged illness, larger lesions, and higher rates of both secondary bacterial skin infections and genital ulcers. more

Mpox continues to affect people around the world. A new framework released today by WHO will guide health authorities, communities and other stakeholders in preventing and controlling mpox outbreaks, eliminating human-to-human transmission of the di...sease, and reducing spillover of the virus from animals to humans. Mpox is a viral illness caused by the monkeypox virus (MPXV). It can cause a painful rash, enlarged lymph nodes and fever. Most people fully recover, but some get very sick. The virus transmits from person to person through close, including sexual, contact. It also has animal reservoirs in east, central and west Africa, where spillovers from animals to humans can occasionally occur, sparking further outbreaks. There are two different clades of the virus: clade I and clade II. Clade I outbreaks are deadlier than clade II outbreaks. A major emergence of mpox linked to clade II began in 2017, and since 2022, has spread to all regions of the world. Between July 2022 and May 2023, the outbreak was declared a Public Health Emergency of International Concern. While that outbreak has largely subsided, cases and deaths continue to be reported today, illustrating that low-level transmission continues around the world. Currently, there is also a major outbreak of clade I virus in the Democratic Republic of the Congo (DRC), where cases have been on the rise for decades. Since the beginning of the year, over 6500 cases and 345 deaths have been reported in the DRC. Almost half of these are among children under the age of 15 years. The Strategic framework for enhancing prevention and control of mpox (2024–2027) provides a roadmap for health authorities, communities, and stakeholders worldwide to control mpox outbreaks in every context, advance mpox research and access to countermeasures, and to minimize zoonotic transmission. more

This document provides information and recommendations for action, based on the current available knowledge around monkeypox. It is a first draft which will be updated in light of evolving evidence and additional information as they become available.... more

The goal of the global outbreak response for monkeypox is to stop human-to-human transmission of monkeypox, with a priority focus on communities at high risk of exposure which may differ according to context, and to effectively use strong public hea...lth measures to prevent onward spread of the disease. Judicious use of vaccines can support this response. This interim guidance, developed with the advice and support of the Strategic Advisory Group of Experts (SAGE) Working Group on smallpox and monkeypox vaccines, provides the first WHO recommendations on vaccines and immunization for monkeypox. Key points follow. more

Smallpox eradication was certified in 1980. Mpox has been endemic in Central and West African countries since it was first detected in 1958 . It is a zoonosis; cases are often found close to tropical rainforests where various animals carry the ortho...poxvirus that causes the disease. In endemic countries, most mpox infections in humans result from a primary animal-to-human transmission. Human-to-human transmission can result from close contact with respiratory secretions, skin lesions of an infected person, or recently contaminated objects. Transmission can also occur via the placenta from mother to fetus or through close contact during and after birth. more

El 23 de julio del 2022, el Director General de la OMS declaró el brote de viruela símica una emergencia de salud pública de importancia internacional. A raíz de esa declaración, se puso en marcha un dispositivo de respuesta coordinada con el o...bjeto de interrumpir la transmisión y proteger a los grupos en situación de vulnerabilidad. En estas orientaciones se tratan diferentes aspectos relativos al uso de vacunas para respaldar las intervenciones primarias de salud púbica en la respuesta para detener la trasmisión de persona a persona. Tienen como propósito brindar información útil y accesible acerca de las vacunas contra la viruela símica a fin de facilitar el despliegue de estrategias de prevención adaptadas a la situación epidemiológica, con base en las recomendaciones de la VIII Reunión ad hoc del Grupo Técnico Asesor de la OPS sobre Enfermedades Prevenibles por Vacunación. more

Monkeypox is an emerging viral zoonosis with symptoms similar to those observed in smallpox patients, although less severe. Since the global eradication of smallpox in 1980, monkeypox has emerged as the most important orthopoxvirus in humans. The Advisory Committee on Variola Virus Research (ACVVR) ...which meets annually to oversee smallpox research has highlighted the importance of diagnostics that could distinguish between variola and other strains of orthopoxviruses, including monkeypox virus. The ACVVR encourages the positive effects of current smallpox research on all orthopoxviruses, specifically monkeypox, such as the development of diagnostic tools. more

Lancet 2022; 399: 1155–200 Published Online March 15, 2022 https://doi.org/10.1016/ S0140-6736(21)02488-0

interim guidance, 25 November 2024

Cases of monkeypox (MPX) acquired in the EU have recently been reported in nine EU Member States (Austria, Belgium, France, Germany, Italy, Portugal, Spain, Sweden, and the Netherlands). Monkeypox (MPX) does not spread easily between people. Human-to-human transmission occurs through close contact ...with infectious material from skin lesions of an infected person, through respiratory droplets in prolonged face-to-face contact, and through fomites. The predominance, in the current outbreak, of diagnosed human MPX cases among men having sex with men (MSM), and the nature of the presenting lesions in some cases, suggest transmission occurred during sexual intercourse more