Grippenet: A New Tool for the Monitoring, Risk-Factor and Vaccination Coverage Analysis of Influenza-Like Illness in Switzerland

Article Article scientifique Article Grippenet: A New Tool for the Monitoring, Risk-Factor and Vaccination Coverage Analysis of Influenza-Like Illness in Switzerland eng 2020 author Richard Aude 0000-0002-7379-402X 889877 author Muller Laura 585424 author Wisniak Ania 717179 ania Wisniak author Thiabaud Amaury 901139 author Merle Thibaut 690044 author Dietrich Damien 596161 author Paolotti Daniela author Jeannot Emilien 0000-0002-6625-3575 649786 author Flahault Antoine 815316 10.3390/vaccines8030343 32605076 2076-393X https://www.mdpi.com/2076-393X/8/3/343 Implemented in Switzerland in November 2016, Grippenet provides Internet-based participatory surveillance of influenza-like illness (ILI). The aim of this research is to test the feasibility of such a system and its ability to detect risk factors and to assess ILI-related behaviors. Participants filled in a web-based socio-demographic and behavioral questionnaire upon registration, and a weekly symptoms survey during the influenza season. ILI incidence was calculated weekly, and risk factors associated to ILI were analyzed at the end of each season. From November 2016 to May 2019, 1247 participants were included. The crossing of the Sentinel System (Sentinella) epidemic threshold was associated with an increase or decrease of Grippenet ILI incidence, within the same week or earlier. The number of active users varied according to ILI incidence. Factors associated with ILI were: ages 0-4 compared with 5-14 (adjusted odds ratio (AOR) 0.6, 95% confidence interval (CI) 0.19-0.99), 15-29 (AOR 0.29, 95% CI 0.15-0.60), and 65+ (AOR 0.38, 95% CI 0.16-0.93); female sex (male AOR 0.81, 95% CI 0.7-0.95); respiratory allergies (AOR 1.58, 95% CI 1.38-1.96), not being vaccinated (AOR 2.4, 95% CI 1.9-3.04); and self-employment (AOR 1.97, 95% CI 1.33-3.03). Vaccination rates were higher than those of the general population but not high enough to meet the Swiss recommendations. Approximately, 36.2% to 42.5% of users who reported one or more ILIs did not seek medical attention. These results illustrate the potential of Grippenet in complementing Sentinella for ILI monitoring in Switzerland. Influenza Influenza-like illness Syndromic surveillance Participatory surveillance Dewey 613 66 Institut de santé globale 22A1 false Vaccines 8 3 4f2c4c41-f797-4773-8ff6-a12807586726 Article (Published version) Public vaccines-08-00343.pdf 1249001 application/pdf CC BY openAccess Faculté de médecine / Section de médecine clinique / Département de santé et médecine communautaires / Institut de santé globale

Title	Published in	Year	Views	Downloads

Grippenet: A New Tool for the Monitoring, Risk-Factor and Vaccination Coverage Analysis of Influenza-Like Illness in Switzerland	Vaccines	2020	448	219
Surveillance of vaccination coverage in 5-6- and 13-14-years-old schoolchildren in Geneva	Archives de pédiatrie	2020	234	1

Archive ouverte UNIGE

Merle, Thibaut