mrcem2-1370

A 6-year-old boy is brought in by his father with an itchy, red and watery right eye. On examination, there is mild erythema of palpebral conjunctiva, and follicles are visible on eversion of the eyelid. Lid oedema is evident, and you can also see a few petechial subconjunctival haemorrhages. The eye appears watery, and there is no purulent discharge. He has recently recovered from a mild upper respiratory tract infection. You make a diagnosis of viral conjunctivitis.

How long does Public Health England recommend that he should be excluded from school?