Abstract
Background/Objectives: The "TROVAILMIOVACCINO" platform was developed to help adults in Italy identify vaccines recommended for them based on individual characteristics, in line with the Italian National Immunization Plan (NIP). The website directs users to an anonymous online questionnaire addressing key factors such as age, sex, pregnancy status, travel history, medical conditions, and risky behaviors. It is intended for adults aged 18 and over and can be filled out either by individuals or by others on their behalf, such as healthcare professionals. The purpose of the study was to assess the platform's reach, the health status of users, and its ability to inform users. Methods: Data were organized into tables and analyzed using frequencies, percentages, and statistical tests to assess user demographics and health conditions. Significant differences among sociodemographic groups were evaluated using the Chi-square and Fisher's exact tests. Results: Over 30 months, the website was accessed 1897 times, with 1622 users (85.5%) completing the questionnaire for personal interest. The majority of users were aged 18-49 years (61.5%), with a nearly equal male-female distribution. Healthcare workers represented the most common professional group (29.2%) among users. Older individuals were more likely to have the questionnaire completed by someone else. Among respondents, 25.8% reported having a single medical condition, with cardiovascular diseases (11.9%), diabetes (6.7%), and respiratory diseases (4.8%) being the most frequent. The most common risk condition reported was potential contact with newborns. Conclusions: The findings highlight the value of the platform in reaching diverse user groups and offering tailored vaccine recommendations.