My 16 yr old nephew, yr11, has been recently diagnosed with Glandular Fever. He has had recurrent illness since last September resulting in disrupted school attendence and was hospitalised in late March with Quincy. His mother is concerned about his exam performance and indeed the quality of the course work that he has submitted. School have asked for a doctors letter but have given her no guidance as to what is required and have thrown out the letter she has submitted. Any advice please?