This is not about the actual benefits or otherwise of wearing masks, but just a bit of a sad/worrying side effect.
One of wifey's teachers had a baby about three months ago and brought her in to the staff room (because that's what new mums do, apparently). Of course, everyone had masks on, and the little tyke wasn't reacting to all the attention. My missus took her mask off and change was instant, a huge smile from baby. I can't help thinking that is somehow interfering with the social development of these babies and toddlers. The ones born two years ago have only ever seen masked faces when out and about. I know you're not supposed to remember much about your life before you are three, but there is surely some memory retention before that age?
When they get older will they remember a time when people didn't have a nose or a mouth, just eyes? Sounds a bit dramatic, but I'm pretty sure there will be some effect.