DHS Further Analysis Reports No. 103
Pre-Publication draft version. Lat reviewed on 7th July 2017
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
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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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3 February 2021
Vaccine- and vaccination-related crises require a communication response that is different from the communication strategies used to promote the benefits and importance of vaccines in general. This document presents the technical guidance needed to develop a communication plan that
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is appropriate for managing crises related to vaccine safety. This guidance will be useful for managers in the areas of immunization and vaccine and vaccination safety. They will also help preparedness and response teams working in safety crises to optimize their communication plans in order to regain, maintain, or strengthen trust in vaccines, vaccination, and immunization programs in general.
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This guide also draws on the standard operating procedures (SOPs) to apply for measles outbreak response
support from the Measles & Rubella Initiative Outbreak Response Fund (17) and includes a section on
measles outbreak recovery so that contributing factors and potential root causes are identifi
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ed and
addressed systematically after a measles outbreak. This guide does not aim to be a comprehensive guide
on measles elimination or routine immunization (RI) more broadly.
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Version 4
The purpose of these standard operating procedures (SOPs) is to offer policy guidance and to provide performance standards on how to respond to any type of poliovirus outbreak or event in a timely and effective
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manner, and specifically, to stop an outbreak within 120 days.
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Compliance with the standards is monitored as part of our Quality Improvement Program.
Practitioner refers to physicians or other health professionals who provide health care services.
The main objectives of the SOPs are to: (i) establish standards and timelines for response activities; and (ii) guide national governments and GPEI partners in key support functions.
This new version of the SOPs presents overall response requirem
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ents for dealing with type 1, 2 and 3 poliovirus following monovalent type 2 oral polio vaccine (mOPV2) cessation. Version 2.4 will be valid until release of revised version 3.0 (anticipated May 2018).
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The objectives of pertussis surveillance are to:hmonitor disease burden and the impact of the pertussis vaccination programme, with a special focus on understanding the morbidity and mortality in children < 5 years of agehgenerate data to inform vaccine schedule and delivery strategy decisions to optimize the impact of
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vaccinationhdetect and guide public health response to outbreaks of pertussis
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15 January 2021
This Aide Memoire is for policy makers, immunization programme managers, infection prevention and control (IPC) focal points at national, sub-national, and facility level, as well as for health workers involved in COVID-19 vaccinati
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on delivery. This document summarizes the key IPC principles to consider and the precautions to take for safely delivering COVID-19 vaccines. The principles and recommendations provided in this document derive from World Health Organization (WHO) IPC and immunization standards and other guidance in the context of COVID-19. WHO will update these recommendations as new information becomes available. All technical guidance for COVID-19 is available online.
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Humanitarian emergencies, regardless of type and cause, have a number of common risk factors for communicable diseases inextricably linked to excess risk of morbidity and mortality which can come from vaccine–preventable diseases (VPDs). The reduction of VPDs is a significant aim of public-health
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interventions during crises.
The WHO Strategic Advisory Group of Experts (SAGE) on Immunization carried out a comprehensive review of evidence on vaccination decision-making processes and considerations in humanitarian emergencies.
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