Below is an instruction from Human. Write a response.
    ### Instruction:
    What causes Rheumatic Fever ?
    ### Response:
    What causes rheumatic fever? Rheumatic fever is an inflammatory condition that may develop approximately 14-28 days after infection with group A Streptococcus bacteria, such as strep throat or scarlet fever. About 5% of those with untreated strep infection will develop rheumatic fever.
    