29 April 2022
What are the new vaccines in the pipeline? What are the challenges to turning vaccines into vaccination ? What timelines can we expect for future vaccines? WHO’s Dr Katherine O’Brien explains in Science in 5.
Bulletin of the World Health Organization Volume 91, Number 4, April 2013, 237-312
As the Americas undergo profound demographic change and there are more persons aged 65 years or older than children younger than 5 years, it is crucial to recognize that national immunization programs must be redesigned to ensure comprehensive protection for individuals across the lifespan. By adopt...ing a life course approach (LCA) to immunization, vaccination programs can be tailored to close immunity gaps at different stages of life. The life course approach foresees the establishment of multiple strategies to reduce missed opportunities for vaccination according to age group. This technical document explains the key concepts of the LCA with a focus on immunization by vaccination, as well as the underlying biological mechanisms that require the application different vaccines at different life stages according to changes to the immune system and in the epidemiological situation of a community.
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The Vaccination Demand Hub is a network of partner organizations innovating together to understand why people miss out and to improve acceptance and uptake of vaccines, to ensure that everyone everywhere is protected against vaccine preventable diseases.
This guide provides a comprehensive overview of essential information related to immunization, including technical information about vaccines, a review of immunization program management best practices, guidance on the delivery of immunization services, monitoring and evaluation, disease surveillanc...e, and the role of behavior change.
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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 orthopoxvirus that causes the disease. In endemic countr...ies, 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.
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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 a sua primeira detecção, em 1958. Trata-se de uma zoonose cujos casos geralmente ocorrem perto de florestas tropicais, ond...e 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.
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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 objeto de interrumpir la transmisión y proteger a l...os 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.
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Diphtheria is caused by Corynebacterium species, mostly by toxin-producing Corynebacterium diphtheriae and rarely by toxin-producing strains of C. ulcerans and C. pseudotuberculosis. The most common type of diphtheria is classic respiratory diphtheria, whereby the exotoxin produced characteristicall...y causes the formation of a pseudomembrane in the upper respiratory tract and damages other organs, usually the myocardium and peripheral nerves. Acute respiratory obstruction, acute systemic toxicity, myocarditis and neurologic complications are the usual causes of death. The infection can also affect the skin (cutaneous diphtheria). More rarely, it can affect mucous membranes at other non-respiratory sites, such as genitalia and conjunctiva.
C. diphtheriae is transmitted from person to person by intimate respiratory and direct contact; in contrast, C. ulcerans and C. pseudotuberculosis are zoonotic infections, not transmitted person-to-person. The incubation period of C. diphtheriae is two to five days (range 1– 10 days). A person is infectious as long as virulent bacteria are present in respiratory secretions, usually two weeks without antibiotics, and seldom more than six weeks. In rare cases, chronic carriers may shed organisms for six months or more. Skin lesions are often chronic and infectious for longer periods. Effective antibiotic therapy (penicillin or erythromycin) promptly terminates shedding in about one or two days.
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Online learning for clinical management staff of respiratory diphtheria in Cox's Bazar, Bangladesh.
In December 2017, the WHO Health Emergencies Programme launched an online learning for clinical staff on respiratory diphtheria through the OpenWHO.org platform. The 4-hour course targets clinicians ...caring for patients during outbreaks in vulnerable settings, such as in Cox's Bazar. It is also applicable to clinicians working in settings that share similar challenges, due to limitations of: laboratory capacity, availability of treatment facilities, number of trained staff, medications, medical supplies, and supportive care.
With the OpenWHO App, users can now view course content on a mobile device, with or without internet connection, once it has been downloaded: an important feature needed in vulnerable settings. Material is now being translated into Bahasa Indonesia and Arabic.
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with special reference to prevention and control of avian influenza
Due to high routine vaccination coverage, overall counts of diphtheria case have significantly declined in the Western Pacific Region recently. However, diphtheria is still prevalent in several countries and areas of the Region and remains a public health issue due to its high case fatality rate.
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This Field Guide for Preparedness and Response to Diphtheria Outbreaks in the Western Pacific Region is a reference resource for Member States to develop national guidelines adapted to their local context. Countries may also use this Guide to facilitate outbreak preparedness and public health responses to reduce morbidity and mortality due to diphtheria.
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28 Dec 2020. The main objective of these guidelines is to provide tools for staff working in the field of immunization to support effective communication between health personnel and the general population, with the aim of strengthening, maintaining or recovering trust in vaccines and the immunizati...on programs in the Region of the Americas.
Available in English, Spanish and Portuguese
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This guidance document provides basic broad principles for a spokesperson
of any health authority on how to respond to vocal vaccine deniers.
The suggestions are based on psychological research on persuasion,
on research in public health, communication studies and on WHO risk
communication guide...lines.
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WHO has developed standardized health kits of medicines and medical supplies to meet different health needs in humanitarian emergencies and disasters.
These kits are developed to provide reliable and affordable medicines and supplies quickly to those in need. The kits are used by United Nations age...ncies, nongovernmental organizations and national governments.
Based primarily on WHO’s Essential Medicines list and guidelines on treatment of specific medical conditions, the contents of the kits are frequently reviewed and updated to adapt to changing needs based on experience in emergency situations.
A certain number of kits are prepositioned in strategic locations to be mobilized quickly in times of need. Long term agreements with suppliers are also in place to ensure rapid shipment wherever needed.
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All health workers deployed to measles outbreaks must complete the measles and rubella (MR) training to implement quality interventions and work safely and effectively in the field. This course provides the essential preparedness, detection, investigation, response, and recovery skills required to c...ontain the measles outbreak.
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