A recent blog post on Smithsonian magazine’s website provides some surprising factors that can make you tastier to mosquitoes. Research suggests mosquitoes land nearly twice as often on those with Type O blood compared to those with Type A.
Pregnant women are also twice as likely to get bitten, probably because they exhale more carbon dioxide and have slightly warmer body temperatures — which also attracts the insects. These are the same reasons mosquitoes tend to bite those who exercise outdoors. Sweat also contains substances that mosquitoes are drawn to by smell.