Trends in influenza vaccination and its determinants among pregnant French women between 2015 and 2020: A single-center study

In 2016, only 7% of French women had received an influenza vaccination during their pregnancy. In this vaccine-averse country, the possibility of reaching the rates of 50% observed in other countries remains unknown. To measure the rate of influenza vaccination in a French university maternity. To study its evolution and determinants over the last 5 years. Single-center observational study of all women who gave birth during March 2020 in this maternity. Comparison with rates observed in 2015 in the same conditions. Of the 337 women included in the study, 202 received a vaccination during pregnancy (59.9%). After logistic regression, the factors significantly associated with achieving vaccination were the offer of vaccination during pregnancy, odds ratio (ORa) 26.2 [7.0; 98.2]; previous vaccination, ORa 20.3 [9.6; 42.6]; high education level, ORa 2.9 [1.3; 6.2]; delivery of a CERFA government reimbursement form, ORa 2.5 [1.3; 4.8]; a vaccination offer made by a general practitioner, ORa 2.1 [1.0; 4.4] and not by a hospital midwife, ORa 0.3 [0.1; 0.6]. The rate of vaccination increased from 35% to 59.9% between 2015 and 2020 (<u><i>p</i></u> < .001), with a significant increase in the offer of vaccination during pregnancy (+14.6%) - especially by a general practitioner (+17.2%) - and in the rate of women with earlier vaccination (+13.6%). In France, vaccination rates above 50% are possible at a center level. A proposal of vaccination during pregnancy - especially by the general practitioner - seems to be a determining factor in this development.