[boredatworkme]

Anecdotal - In my country, doctors advice newborns to be given a certain dosage of Vit-D for the first year, in addition to trying to get them out in the open in the morning sun. We seem to be fairing slightly better with respect to COVID mortality numbers.

[mattlondon]

Same here in the UK (and baby formula even has to have Vit D (among a big list of other things) in it) with advice to leave babies by windows and go for walks to avoid jaundice etc, but we're still seeing terrible rates of infection.