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Influenza during pregnancy: Incidence, vaccination coverage and attitudes toward vaccination in the French web-based cohort G-GrippeNet.

Abstract：

INTRODUCTION:Pregnancy is a risk factor for severe influenza. However, data on influenza incidence during pregnancy are scarce. Likewise, no data are available on influenza vaccine coverage in France since national recommendation in 2012. We aimed to assess these points using a novel nationwide web-based surveillance system, G-GrippeNet. METHODS:During the 2014/2015 influenza season, pregnant women living in metropolitan France were enrolled through a web platform (https://www.grippenet.fr/). Throughout the season, participants were asked to report, on a weekly basis, if they had experienced symptoms of influenza-like-illness (ILI). ILI episodes reported were used to calculate incidence density rates based on period of participation from each participant. Vaccination coverage was estimated after weighing on age and education level from national data on pregnant women. Factors associated with higher vaccination coverage were obtained through a logistic regression with Odds Ratio (OR) corrected with the Zhang and Yu method. RESULTS:A total of 153 women were enrolled. ILI incidence density rate was 1.8 per 100 person-week (95% CI, 1.5-2.1). This rate was higher in women older than 40 years (RR = 3.0, 95% CI [1.1-8.3], p = 0.03) and during first/second trimesters compared to third trimester (RR = 4.0, 95% CI [1.4-12.0], p = 0.01). Crude vaccination coverage was 39% (95% CI, 31-47) and weighted vaccination coverage was estimated at 26% (95% CI, 20-34). Health care provider recommendation for vaccination (corrected OR = 7.8; 95% CI [3.0-17.1]) and non-smoking status (cOR = 2.1; 95% CI [1.2-6.9]) were associated with higher vaccine uptake. CONCLUSION:This original web based longitudinal surveillance study design proved feasible in pregnant women population. First results are of interest and underline that public health policies should emphasize the vaccination promotion through health care providers.

journal_name

Vaccine

journal_title

Vaccine

authors

Loubet P,Guerrisi C,Turbelin C,Blondel B,Launay O,Bardou M,Goffinet F,Colizza V,Hanslik T,Kernéis S,GGNET study group.

doi

10.1016/j.vaccine.2016.03.034

subject

Has Abstract

pub_date

2016-04-29 00:00:00

pages

2390-6

issue

eissn

0264-410X

issn

1873-2518

pii

S0264-410X(16)30007-X

journal_volume

pub_type

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Influenza during pregnancy: Incidence, vaccination coverage and attitudes toward vaccination in the French web-based cohort G-GrippeNet.