Which school year groups are seeing most COVID cases in secondary schools?

Drilling down into the latest Public Health England data, which shows secondary schools are second only to supermarkets as a setting where people are catching the virus, we can see it is older age group among which the virus is most prevalent.

https://news.sky.com/story/covid-live-news-latest-uk-updates-rugby-and-10-other-sports-to-get-300m-pandemic-rescue-package-12133703

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