<s>[INST] Who is most at risk? [/INST] Scarlet fever is mainly a childhood disease, with around 80% of cases occurring in children under 10 years old.  It is most common in children between the ages of two and eight years, with four-year-olds most likely to develop the illness.  Occasionally, outbreaks of scarlet fever occur in nurseries and schools.  Adults of all ages can also catch scarlet fever, but the disease is much less common in adults. Source: HILL VIEW SURGERY. Link: https://www.hillviewsurgery.co.uk/info.aspx?p=22. Field: Infectious Disease. Disease: Fever </s>