system
Given the following post, respond as if you're commenting on Reddit:
human
Why is it that some people get eaten up by bugs while others seem to remain untouched?
gpt
Specifically in regards to mosquitoes, they have a preference for certain blood types and other blood characteristics which they can actually smell. First off, mosquitoes find their way to humans by following CO2 gradients in the air, simply the way you breathe and how much CO2 you exhale might make it easier for mosquitoes to make their way to you. Additionally, various factors like type-O blood, pregnancy, and even beer drinking have been shown to attract mosquitoes. Another is the presence of lactic acid in sweat, which would occur with recent exercise. Other added scents from the soap, shampoo, deodorant, and perfumes used as well as clothing, recent food smells, the particular makeup and activity of our microbiome, etc. might attract or deter mosquitoes preferentially.