Czech researchers from Charles University examined how the presence or absence of vaccines against various diseases affects perceived attractiveness. The study was published in the scientific journal magazine Evolutionary Psychology (EVP).
The trial included 21 healthy, nonsmoking men ages 18 to 40 who had not been vaccinated against hepatitis A/B or meningococcus in the past decade. Participants provided body odor samples, facial photographs, and audio recordings 14 days before and after vaccination against specified diseases.
The volunteers’ attractiveness was evaluated by 88 women based on body odor, facial beauty and voice timbre criteria.
The team found a significant positive correlation between scent appeal and health before and after vaccination.
There was a noticeable increase in the attractiveness of body odor and a decrease in the intensity of this odor; this suggests an improvement in the perceived quality of body odor after vaccination.
However, men’s perceived beauty in terms of facial attractiveness decreased after vaccination.
It was also revealed that the vaccine had no effect on voice evaluation.
According to the researchers, the results suggest that more than one sensory cue is used when assessing health status and support the “multiple message” hypothesis. He says that people analyze the external data of their interlocutors at different levels.
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