My take –
Nevertheless, head lice do indeed pass predominantly from head-to-head contact and it would appear, in this “digital age,” that the prevalence of opportunities for such contact have increased.
- There’s a lot of collaborative work, reading and other activities occurring in classroom settings these days which often renders children and adolescents touching heads with others. (The days of children lined up in desks watching a teacher give lessons only are pretty much gone. Children sit on rugs, at tables, in small groups, over microscopes, etc. – in very close proximity – and often with heads touching.)
- Children (of all ages) enjoy playing handheld or electronic games and watching videos/looking at tablets, laptops, etc. – together – often with head to head contact.
- Adolescents and teens share emails and texts while peering at their phones – head to head.
- Children and adults of all ages are indeed engaging in taking selfies with friends/others which by their nature do “encourage” head to head contact.
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