alexa An airborne outbreak of smallpox in a German hospital and its significance with respect to other recent outbreaks in Europe.
General Science

General Science

Journal of Bioterrorism & Biodefense

Author(s): Wehrle PF, Posch J, Richter KH, Henderson DA

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Abstract Since 1960, smallpox has been introduced into 10 European countries on 28 separate occasions. Most commonly, the index case was infected in Asia and returned to Europe by air during the period December-May. Subsequent cases have occurred mainly among persons exposed by direct, face-to-face, contact in the household or hospital. Medical and hospital personnel, patients and visitors constituted approximately half of all cases in these outbreaks.In a recent outbreak in Meschede, Federal Republic of Germany, detailed epidemiological studies have clearly indicated that 17 of the cases were infected by virus particles disseminated by air over a considerable distance within a single hospital building. Several features believed to be of importance in this unusual pattern of transmission were common to a similar outbreak in the Federal Republic of Germany in 1961 in which airborne transmission also occurred. These features include a source case with extensive rash and cough, low relative humidity in the hospital and air currents which caused rapid dissemination of the virus. While airborne transmission of this sort is rarely observed in smallpox outbreak, it is important to recognize that it may occur under certain circumstances.Proper vaccination of travellers prior to their departure from their native countries and a regular programme for vaccination of medical and hospital personnel could have prevented at least half of the cases which occurred in Europe during the past decade. Although progress in the global smallpox eradication programme has been accompanied by a decreased frequency of importations into Europe, no country should relax its vigilance until smallpox has been eliminated everywhere.
This article was published in Bull World Health Organ and referenced in Journal of Bioterrorism & Biodefense

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