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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the Lancet : Published Online July 31, 2015 http://dx.doi.org/10.1016/S0140-6736(15)61117-5
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 health measures to prevent onward spread of the diseas...e. 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.
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updated version: 04/10/2021
Information about vaccine administration
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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Weekly epidemiological recordRelevé épidémiologique hebdomadaire 3 MAY 2024, 99th YEAR / 3 MAI 2024, 99e ANNÉE
No 18, 2024, 99, 203–224
The WHO position papers are concerned primarily with the use of vaccines in large-scale vaccination programmes.
The position papers are intended for use by... national public health officials and managers of immunization programmes.
This paper focuses on the second licensed dengue vaccine, TAK-003 (Qdenga, Takeda), along with WHO’s position for its use, and provides an update on the first licensed dengue vaccine, CYD-TDV.
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Comment The Lancet Volume 397, ISSUE 10269, P72-74, January 09, 2021
Published:December 08, 2020DOI:https://doi.org/10.1016/S0140-6736(20)32623-4
WHO Vaccine Management Handbook
6 June 2022
These WHO interim recommendations on the use of the Janssen Ad26.COV2.S (COVID-19) vaccine were developed on the basis of advice issued by the Strategic Advisory Group of Experts on Immunization (SAGE) and the evidence summary included in the background document referenced below.
Th...is document has been updated: Version 6 June 2022.
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The Committee examined the clinical development of Ebola virus vaccines and conducted an inventory of available data on their safety. It also reviewed 3 generic issues: updating a global strategy on vaccine safety, use of a network of distributed data ... to monitor the safety of vaccines and case studies of communication about the safety of human papillomavirus (HPV) vaccines.
Weekly epidemiological record/Relevé épidémiologique hebdomadaire 12 JULY 2019, 94th YEAR / 12 JUILLET 2019, 94e ANNÉENo 28, 2019, 94, 309–316
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This position paper on polio vaccines replaces the 2016 WHO position paper, and summarizes recent developments in the field.
On the 9 February 2021, Africa CDC convened a special session of the Africa Task Force for COVID-19 to review existing data and evidence and recommend
This catalogue provides tools and information resources to support EU/EEA countries in addressing the challenging issue of vaccine hesitancy. The catalogue provides examples of practices that can serve as a resource for other countries. The project was developed in the context of ECDC’s support fo...r EU/EEA Member States in prevention and control of vaccine-preventable diseases, including effective communication to promote immunisation.
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Guidance for addressing a global infodemic and fostering demand for immunization
December 2020
Misinformation threatens the success of vaccination programs across the world. This guide aims to help organizations to address the global infodemic through the development of strategic and well-coordina...ted national action plans to rapidly counter vaccine misinformation and build demand for vaccination that are informed by social listening.
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Vaccines are powerful weapons in the fight against pandemic viruses as shown by responses to both the 2009 H1N1 influenza and the COVID-19 pandemics. However, planning for accessing, allocating and deploying vaccines in a pandemic situation is a complex endeavour, beset with multiple challenges at a...ll levels – local, regional and global. The World Health Organization (WHO) and its partners have prepared this revised guidance document to assist countries update their national deployment and vaccination plans (NDVPs) by leveraging global learnings from past pandemic responses, including the recent COVID-19 vaccination effort. The development and testing of a NDVP would not only advance pandemic preparedness efforts but would also have benefits in terms of increasing national capabilities to manage other health emergencies which require emergency vaccination campaigns.
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