For the poster who said 7% was an unfounded statistic for children with Long Covid -
Let's start with stats for Long Covid worldwide (As PP said, researchers use different metrics but a common one seems to be either 1 or 2 or more symptoms, lasting 3+ months after infection).
Studies have shown Long Covid rates at around 10% (of global population who have been infected by Covid). Research on UK population backs up this figure.
Skip to 40.51 to hear professor Danny Altman, an Immunologist at Imperial, talking about Long Covid.
www.bbc.co.uk/sounds/play/m000xsv7
A previous contributor to the programme said there are now 1 million cases in the UK.
Research on the Long Covid Kids Web page for articles specifically on children and rates. As one researcher points out, data on children is harder to gather. Stats I have seen in various research articles seem to vary from 4% in younger children ( 2 to 11 year olds) and higher for children in the upper age group (12 to 16) with rates of between 7 and 9% at 12 weeks after infection.
That's a conservative figure - I have seen 12 to 14% quoted by ONS. See link below -
Here's a nice graph based on around 9000 UK respondents which shows a graph by age (page 2)
assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/962830/s1079-ons-update-on-long-covid-prevalence-estimate.pdf
Here are just two of a of a number of articles -
'Another study by the UK Office for National Statistics (ONS) suggests that 10% of children between 2 and 11 years and 12 and 16 years, respectively, had persistent symptoms at five weeks. At 12 weeks, 7-8% still had symptoms.'
www.news-medical.net/news/20210624/Long-COVID-has-low-prevalence-in-school-age-children-UK-study-suggests.aspx
www.ncbi.nlm.nih.gov/pmc/articles/PMC7927578/
I work in the academic field - with all due respect I am not pulling stats out of my rear end!
A big research grant has just been awarded (1.4 million) to Great Ormond Street to research this in children.
Stats on children do vary somewhat, so if we take the middle ground and go with a conservative figure of 7% - given the numbers of cases, it will still impact a substantial number of families. More girls than boys it seems from a couple of studies.
So girls of 11 to 16 seem somewhat more at risk of developing LC according to studies so far. I'm not wildly surprised at this - a lot more women get CFS than men. It is suggested (not yet proven) that this is to do with differences in immune responses.
The NHS lead on LC (Dr David Strain of Exeter University) said in his Horizon appearance that even if you get mild Covid - rest for longer than you think you need to. Rushing back to work (or school I would say) before full recovery (he said rest for 2, 3 or even 4 weeks) could leave you more at risk of Long Covid. This was based on his observations of potential causes.
www.gov.uk/government/news/185-million-to-tackle-long-covid-through-research
Yes - it is still poorly understood in both adults and children - but there is no doubt it is occurring and numbers likely to go up based on general infections going up.