<prompt> According to American hea association world hea federation 2015 criteria, low risk is defined as having An Acute Rheumatic Fever incidence --- per 100,000 school aged children per year?120.10.01  <response>: - As per AHA world hea federation 2015 criteria: Low risk is defined as having an Acute Rheumatic Fever incidence 2 per 100,000 school aged children 5-14 yrs year or Prevalence of RHD of 1 per 1000 population per year . 