<unk>  occurs equally in both males and females. Children are most commonly infected, typically between 5–15 years old. Although streptococcal infections can happen at any time of year, infection rates peak in the winter and spring months, typically in colder climates. The morbidity and mortality of<unk>  has declined since the 18th and 19th century when there were epidemics caused by this disease. Around 1900 the mortality rate in multiple places reached 25%. The improvement in prognosis can be attributed to the use of penicillin in the treatment of this disease. The frequency of<unk>  cases has also been declining over the past century. There have been<unk> al reported outbreaks of the disease in various countries in the past decade. The reason for these recent increases remains unclear in the medical community. Between 2013 and 2016 population rates of<unk>  in England increased from 8.2 to 33.2 per 100,000 and hospital admissions for<unk>  increased by 97%.
Scarlet fever
Roseola
Haverhill fever
Toxic shock syndrome
Boutonneuse fever
Kawasaki disease
Murine typhus
Scrub typhus