@Evenkeeld @Jagahati @echoteecat
@pesce05

Mosquitos actually have preferences.
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Results indicate that the female mosquitoes had a strong preference towards the blood group B, while in the case of females fed on O blood group had the highest digestibility rate. Overall, the human blood type had a significant impact on the fecundity and fertility of female An. stephensi.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8692623/

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Also,

Applying integrative whole body volatilomics to multiple humans tested simultaneously in competition in a six-choice assay, we reveal high attractiveness is associated with whole body odor profiles from humans with increased relative abundances of the volatile carboxylic acids butyric acid, isobutryic acid, and isovaleric acid, and the skin microbe-generated methyl ketone acetoin. Conversely, those least preferred had whole body odor that was depleted of carboxylic acids among other compounds and enriched with the monoterpenoid eucalyptol.
https://www.cell.com/current-biology/fulltext/S0960-9822(23)00532-8