The return rate of questionnaires was 70% for travelers after travel (n = 230) and 60% for experts (n = 18). Demographic and travel-related characteristics of the travelers are presented in Table 1. About 50% were women and 40% were older than 40 years. Most traveled for leisure (79%). Asia/Pacific (38%) and Africa (36%) were the most common regions of destinations. More

than half of all participants had previously visited the respective region (56%). Nearly half (42%) consulted the Travel Clinic less than 4 weeks prior to departure. The median planned duration of the journey was 3 weeks (interquartile range 16–32 days). (sub-)tropical destination(s) Figure 3 shows the risk perception of travelers versus experts. According to the experts, the highest Thiazovivin cost risks for Trichostatin A cost travelers are accidents followed by mosquitoes, STIs, malaria, rabies, and epidemic outbreaks. Terrorist attacks and VAEs were ranked lowest. Contrary to the experts’ assessment, the travelers perceived accidents and STIs as significantly lower risks [accidents: median SRS 13.3 cm, 95% CI: 12.9–14.3 cm (travelers) vs 7.8 cm, 95% CI: 6.8–8.8 cm (experts); STIs: 23.6 cm, 95% CI: 23.1–24.3 cm (travelers) vs 14.4 cm, 95% CI: 12.6–16.4 cm (experts)]. STIs ranked third for the experts and last for the travelers, while all the other risks ranked similarly in both groups. Compared to the experts’ assessment, the travelers’ risk perception of VAEs was higher (not statistically

significant) (Figure 3). The travelers’ pre- and post-travel risk perceptions were similar with a trend toward a lower risk perception after travel for most items. Only accidents were perceived as a higher risk after travel, but still ranked lower than the experts’ assessment in absolute figures. Thus, only mosquitoes (rank 1 to 2) and accidents (rank 2 to 1) changed position on the ranking list after travel. With the exception of STIs, the experts showed similar or smaller ranges of distribution than the travelers (Figure 3). Gender, age, destination, and region-related travel experience had different impacts on the travelers’ risk perception (Figure 4). The following differences

were detected before travel: general risk and mosquitoes were considered as lower risks in Asia/Pacific than O-methylated flavonoid in Africa (log10-transformed coefficient 0.07, 95% CI: 0.02–0.12; 0.08, 95% CI: 0.02–0.14), and malaria was perceived as a lower risk in Asia/Pacific and Latin America than in Africa (0.15, 95% CI: 0.09–0.21; 0.19, 95% CI: 0.12–0.26). Men perceived mosquitoes, malaria, and rabies as higher risks than women (−0.09, 95% CI: −0.14 to −0.04; −0.09, 95% CI: −0.15 to −0.04; −0.05, 95% CI: −0.09 to −0.01). Compared to younger participants, travelers aged >40 years considered terrorist attacks as a higher risk and STIs as a lower risk (−0.04, 95% CI: −0.07 to −0.0004; 0.04, 95% CI: 0.002–0.08). Epidemic outbreaks and VAEs were perceived similarly by all subgroups before and after travel.