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... To find out why the blood-sucking critters prefer some people over others, a research team led by Felix Hol of Radboud University Nijmegen took thousands of female Anopheles mosquitoes to Lowlands, an annual music festival held in the Netherlands.

Researchers set up a pop-up lab in connected shipping containers in 2023, and around 500 volunteers took part. First, they filled out a questionnaire about their hygiene, diet and behavior at the festival.

Then, to see how attractive they are to mosquitoes, they placed their arm into a custom-designed cage filled with the pesky insects.

The cage had tiny holes so the mosquitoes could smell the person's arm but couldn't bite them. A video camera recorded how many insects landed on a volunteer's arm compared to a sugar feeder on the other side of the cage. By comparing the video footage and questionnaire answers, researchers saw some clear results emerge. ...