An interesting article about the way Covid Delta spreads in schoolchildren, from the Taringa/Indooroopilly outbreak here in Brisbane.
https://www.brisbanetimes.com.au/na...ts-lessons-for-australia-20210804-p58fmv.html
This outbreak is very well understood, with full viral genome sequencing and detailed contact tracing having been achieved for every person involved. This is happening in a city with no other Covid cases to 'muddy the waters'; Every case in Brisbane is directly linked to this single outbreak.
The remaining mystery is how the index case, a 17 year old girl, contracted the virus which was brought into Australia by two international travelers, both of whom were in quarantine. The leading hypothesis is that a medical student who is also the girl's tutor may have carried the virus from Sunshine Coast Hospital, where one of the overseas travelers was being treated, but that link has not been adequately demonstrated so far.
The vast majority of cases are at a half dozen schools, all of which are attended by children of upper middle class wealthy families in the inner West. One strange effect of this has been a significant doctor shortage in our hospitals, as many surgeons and medical specialists have been quarantined due to their children attending one or more of these schools.
It is very clear from this outbreak that, despite the disease usually being mild in children, they are very important and significant vectors, and a major factor in transmission to adult patients, where the disease is far more serious.