[#NZ] New Zealand’s #experience of the 1918-19 #influenza #pandemic: a systematic review after 100 years (N Z Med J., abstract)

[Source: US National Library of Medicine, full page: (LINK). Abstract, edited.]

N Z Med J. 2018 Dec 14;131(1487):54-69.

New Zealand’s experience of the 1918-19 influenza pandemic: a systematic review after 100 years.

Summers JA1, Baker M2, Wilson N2.

Author information: 1 Postdoctoral Research Fellow in Medical Statistics, School of Population Health and Environmental Sciences, Faculty of Life Sciences and Medicine, King’s College London, London, United Kingdom. 2 Professor of Public Health, Department of Public Health, University of Otago, Wellington.

 

Abstract

BACKGROUND:

The 1918-1919 influenza pandemic has been New Zealand’s most severe disaster event (around 9,000 deaths). We aimed to review the literature related to this pandemic in New Zealand and among New Zealanders overseas, to identify any remaining research gaps (given ongoing risks of future influenza pandemics and from new pathogens, eg, synthetic bioweapons).

METHODS:

Systematic literature searches and comparisons with international findings for this pandemic to facilitate identification of research gaps.

RESULTS:

A total of 61 relevant publications were identified. The epidemiological patterns reported were largely consistent with the international literature for this pandemic. These features included the w-shaped age-distribution for mortality, and the much higher mortality rates for indigenous people (ie, seven-fold for Māori vs New Zealand European). But some novel risk factors were identified (eg, large chest size as a risk factor for death in military personnel), and there was an extremely high mortality troop ship outbreak (probably related to crowding). In contrast to some international work, there was an apparent lack of a socio-economic gradient in mortality rates in two studies using modern analytical methods. New Zealand work has clearly shown how the pandemic spread via the rail network and internal shipping routes and the rarity of successful measures to prevent spread in contrast to some other jurisdictions. It has also found a marked lack of memorials to the pandemic (in contrast to war memorials). Nevertheless, some research gaps remain, including on the apparent marked reduction in birth rates in 1918-1919 and the reasons for no socio-economic gradient despite other New Zealand evidence for occupational class variation in lifespan at this time.

CONCLUSIONS:

This is a relatively well-studied disaster event but there remain important research questions relating to this pandemic in New Zealand. Filling these gaps may contribute to improved planning for managing future pandemics.

PMID: 30543612

Keywords: Pandemic Influenza; Spanish Flu; New Zealand.

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#Influenza #Cataclysm, 1918 (N Engl J Med., summary)

[Source: The New England Journal of Medicine, full page: (LINK). Summary, edited.]

Influenza Cataclysm, 1918

David M. Morens, M.D., and Jeffery K. Taubenberger, M.D., Ph.D.

December 13, 2018 / N Engl J Med 2018; 379:2285-2287 / DOI: 10.1056/NEJMp1814447

 

Audio Interview

Interview with Dr. David Morens on lessons from the 1918 influenza pandemic and the threat of a similar global health disaster. 

This year marks the centennial of an influenza pandemic that killed 50 million to 100 million people globally — arguably the single deadliest event in recorded human history. Evidence suggests that another pandemic at least as severe may occur one day.

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Disclosure forms provided by the authors are available at NEJM.org.

Author Affiliations: From the Office of the Director (D.M.M.) and the Viral Pathogenesis and Evolution Section, Laboratory of Infectious Diseases (J.K.T.), National Institute of Allergy and Infectious Diseases, Bethesda, MD.

Keywords: Pandemic Influenza; Spanish Flu; H1N1; History.

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#Spanishflu in #Italy: new #data, new questions (Infez Med., abstract)

[Source: US National Library of Medicine, full page: (LINK). Abstract, edited.]

Infez Med. 2018 Mar 1;26(1):97-106.

Spanish flu in Italy: new data, new questions.

Fornasin A1, Breschi M2, Manfredini M3.

Author information: 1 Department of Economics and Statistics, University of Udine, Italy. 2 Department of Economics and Business, University of Sassari, Italy. 3 Department of Life Sciences, University of Parma, Italy.

 

Abstract

This paper proposes a new estimate for the number of victims of Spanish flu in Italy and highlights some aspects of mortality closely linked to the First World War. The sources used are official death statistics and the Albo d’oro, a roll of honor of the Italians fallen in the First World War. The new estimate of deaths from the flu is 410,000 for 1918, which should be raised to 466,000 when the numbers are taken up to 1920. Deaths from Spanish flu among the military were about 70,000. The time sequence of deaths recognizes two distinct peaks, one in October and one in November 1918. Between these two peaks, the lowest number of deaths falls in the week of the armistice between Italy and Austria-Hungary (signed 4 November 1918). This suggests links between Spanish flu and WWI that cannot be merely explained in terms of movement of people and contagion.

PMID: 29525806[Indexed for MEDLINE] Free full text

Keywords: Pandemic Influenza; Spanish Flu; H1N1; Italy; Society; Wars.

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#Natality #Decline and Spatial #Variation in Excess #Death Rates During the 1918-1920 #Influenza #Pandemic in #Arizona, #USA (Am J Epidemiol., abstract)

[Source: US National Library of Medicine, full page: (LINK). Abstract, edited.]

Am J Epidemiol. 2018 Dec 1;187(12):2577-2584. doi: 10.1093/aje/kwy146.

Natality Decline and Spatial Variation in Excess Death Rates During the 1918-1920 Influenza Pandemic in Arizona, United States.

Dahal S1, Mizumoto K1,2, Bolin B3, Viboud C, Chowell G1,4.

Author information: 1 Department of Population Health Sciences, School of Public Health, Georgia State University, Atlanta, Georgia. 2 Graduate School of Medicine, Hokkaido University, Hokkaido, Japan. 3 School of Human Evolution and Social Change, Arizona State University, Tempe, Arizona. 4 Division of International Epidemiology and Population Studies, Fogarty International Center, National Institutes of Health, Bethesda, Maryland.

 

Abstract

A large body of epidemiologic research has concentrated on the 1918 influenza pandemic, but more work is needed to understand spatial variation in pandemic mortality and its effects on natality. We collected and analyzed 35,151 death records from Arizona for 1915-1921 and 21,334 birth records from Maricopa county for 1915-1925. We estimated the number of excess deaths and births before, during, and after the pandemic period, and we found a significant decline in the number of births occurring 9-11 months after peak pandemic mortality. Moreover, excess mortality rates were highest in northern Arizona counties, where Native Americans were historically concentrated, suggesting a link between ethnic and/or sociodemographic factors and risk of pandemic-related death. The relationship between birth patterns and pandemic mortality risk should be further studied at different spatial scales and in different ethnic groups.

PMID: 30508194 DOI: 10.1093/aje/kwy146

Keywords: Pandemic Influenza; H1N1; Spanish Flu; Society; USA; Arizona.

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#Origins of the 1918 #Pandemic: Revisiting the #Swine “Mixing Vessel” #Hypothesis (Am J Epidemiol., abstract)

[Source: US National Library of Medicine, full page: (LINK). Abstract, edited.]

Am J Epidemiol. 2018 Dec 1;187(12):2498-2502. doi: 10.1093/aje/kwy150.

Origins of the 1918 Pandemic: Revisiting the Swine “Mixing Vessel” Hypothesis.

Nelson MI1, Worobey M2.

Author information: 1 Division of International Epidemiology and Population Studies, Fogarty International Center, National Institutes of Health, Bethesda, Maryland. 2 Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, Arizona.

 

Abstract

How influenza A viruses host-jump from animal reservoir species to humans, which can initiate global pandemics, is a central question in pathogen evolution. The zoonotic and spatial origins of the influenza virus associated with the “Spanish flu” pandemic of 1918 have been debated for decades. Outbreaks of respiratory disease in US swine occurred concurrently with disease in humans, raising the possibility that the 1918 virus originated in pigs. Swine also were proposed as “mixing vessel” intermediary hosts between birds and humans during the 1957 Asian and 1968 Hong Kong pandemics. Swine have presented an attractive explanation for how avian viruses overcome the substantial evolutionary barriers presented by different cellular environments in humans and birds. However, key assumptions underpinning the swine mixing-vessel model of pandemic emergence have been challenged in light of new evidence. Increased surveillance in swine has revealed that human-to-swine transmission actually occurs far more frequently than the reverse, and there is no empirical evidence that swine played a role in the emergence of human influenza in 1918, 1957, or 1968. Swine-to-human transmission occurs periodically and can trigger pandemics, as in 2009. But swine are not necessary to mediate the establishment of avian viruses in humans, which invites new perspectives on the evolutionary processes underlying pandemic emergence.

PMID: 30508193 DOI: 10.1093/aje/kwy150

Keywords: Avian Influenza; Swine Influenza; Influenza A; Pandemic Influenza; H1N1; Spanish Flu; Pigs; Reassortant strain.

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1818, 1918, 2018: Two #Centuries of #Pandemics (Health Secur., abstract)

[Source: US National Library of Medicine, full page: (LINK). Abstract, edited.]

Health Secur. 2018 Dec 4. doi: 10.1089/hs.2018.0083. [Epub ahead of print]

1818, 1918, 2018: Two Centuries of Pandemics.

Snyder MR1,2, Ravi SJ1,2.

Author information: 1 Michael R. Snyder, MALD, is an Analyst, and Sanjana J. Ravi, MPH, is a Senior Analyst, both at the Johns Hopkins Center for Health Security. 2 Both are Research Associates at the Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland.

 

Abstract

2018 marks the centennial of the 1918 influenza pandemic, widely acknowledged as one of the deadliest infectious disease crises in human history. As public health and medical communities of practice reflect on the aftermath of the influenza pandemic and the ways in which it has altered the trajectory of history and informed current practices in health security, it is worth noting that the Spanish flu was preceded by a very different 100-year threat: the first Asiatic cholera pandemic of 1817 to 1824. In this commentary, we offer a historical analysis of the common socioeconomic, political, and environmental factors underlying both pandemics, consider the roles of cholera and Spanish flu in shaping global health norms and modern public health practices, and examine how strategic applications of soft power and broadening the focus of health security to include sustainable development could help the world prepare for pandemics of the future.

PMID: 30511884 DOI: 10.1089/hs.2018.0083

Keywords: Pandemics; Pandemic preparedness; Influenza A; Cholera; Society.

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Sex- and age-based #differences in #mortality during the 1918 #influenza #pandemic on the island of #Newfoundland (Am J Hum Biol., abstract)

[Source: US National Library of Medicine, full page: (LINK). Abstract, edited.]

Am J Hum Biol. 2018 Nov 29:e23198. doi: 10.1002/ajhb.23198. [Epub ahead of print]

Sex- and age-based differences in mortality during the 1918 influenza pandemic on the island of Newfoundland.

Paskoff T1, Sattenspiel L1.

Author information: 1 Department of Anthropology, University of Missouri, Columbia, Missouri.

 

Abstract

OBJECTIVES:

Our aim was to understand sex- and age-based differences in mortality during the 1918 influenza pandemic on the island of Newfoundland. The pandemic’s impact on different age groups has been the focus of other research, but sex-based differences in mortality are rarely considered. Aspects of social organization, labor patterns, and social behaviors that contribute to mortality between males and females at all ages are used to explain observed mortality patterns.

METHODS:

Recorded pneumonia and influenza deaths on the island (n = 1871) were used to calculate cause-specific death rates and to evaluate differences in sex-based mortality. Mortality levels in 17 districts and four regions (Avalon, North, South, and West) were compared using standardized mortality ratios (SMRs). A logistic regression model was fit to determine in which regions sex-based mortality could be predicted using age and region as interactive predictors.

RESULTS:

Differences in sex-based mortality varied across regions; they were not significant for the aggregate population. SMRs were also variable, with no significant sex-based differences. Sex-based differences were highly variable within regions. Results from a logistic regression analysis suggest that females in the South region may have experienced a higher probability of death than other island residents.

CONCLUSIONS:

Mortality analysis for aggregate populations homogenizes important epidemiologic patterns. Men and women did not experience the 1918 influenza pandemic in the same way, and by analyzing data at the regional and district geographic levels, patterns emerge that can be explained by the economies and social organization of the people who lived there.

© 2018 Wiley Periodicals, Inc.

PMID: 30488509 DOI: 10.1002/ajhb.23198

Keywords: Pandemic Influenza; H1N1; Spanish Flu; Canada.

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