Seasonal influenza vaccine and Guillain-Barré syndrome
- 19 May 2020
- journal article
- research article
- Published by Ovid Technologies (Wolters Kluwer Health) in Neurology
- Vol. 94 (20), e2168-e2179
- https://doi.org/10.1212/wnl.0000000000009180
Abstract
Objective To evaluate the risk of Guillain-Barré syndrome (GBS) following seasonal influenza vaccination based on French nationwide data. Methods All cases of GBS occurring in metropolitan France between September 1 and March 31 from 2010 to 2014 were identified from the French national health data system. Data were analyzed according to the self-controlled case series method. The risk period started 1 day after the patient received vaccine (D1) until 42 days after vaccination (D42). The incidence of GBS during this risk period was compared to that of the control period (D43–March 31). The incidence rate ratio (IRR) was estimated after adjusting for seasonality and presence or not of acute infections. Results Between September and March, of the 2010/2011 to 2013/2014 influenza vaccination seasons, 3,523 cases of GBS occurred in metropolitan France and were included in the study. Among them, 15% (527 patients) had received influenza vaccination. A total of 140 patients developed GBS during the 42 days following influenza vaccination. The crude risk of developing GBS was not significantly increased during the 42 days following influenza vaccination (IRR, 1.02; 95% confidence interval [CI], 0.83–1.25; p = 0.85). This result remained nonsignificant after adjustment for calendar months and the incidence of acute gastrointestinal and respiratory tract infections (IRR, 1.10; 95% CI, 0.89–1.37; p = 0.38). In contrast, the risk of GBS was fourfold higher after acute respiratory tract infection (IRR, 3.89; 95% CI, 3.52–4.30; p < 0.0001) or gastrointestinal infection (IRR, 3.64; 95% CI, 3.01–4.40; p < 0.0001). Conclusions No association between seasonal influenza vaccination and GBS was shown during the 42 days following vaccination.Keywords
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