ELI5 Mosquitos - why some people get bitten more than others?

Do women get more mosquito bites than men? Does your blood type mean you get bitten more? Why are mosquitos unable to spread HIV and AIDS? Why is it only female mosquitos that bite?   ... We explain like i'm five!   Thank you to the r/explainlikeimfive community as always and in particular the following users whose questions and comments formed the basis of this discussion: shrewdmilk5, irritatedcitydweller, sintripital, henipah, martupdown & quarkylittlehadron To the ELI5 community that has supported us so far, thanks for all your feedback and comments. Join us on Twitter: https://www.twitter.com/eli5ThePodcast/ or send us an e-mail: [email protected]