BBC News
By Philippa Roxby
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Since the end of the second lockdown in England, the numbers of people being admitted to hospital with Covid have been rising quickly on a daily basis.
Some healthcare staff say they are seeing younger patients, so what does the data show?
Are different age groups being affected now?
There are more people of all ages in hospital with Covid now than in the first wave last spring - that includes the young and old.
Infections have been highest in teenagers, students and people in their 20s and 30s in recent months. A small percentage of people from these age groups inevitably end up in hospital needing treatment.