A 7-year-old boy has a bright-pink punctate rash against the background of hyperemia on his forehead, neck, lower abdomen, and in the popliteal spaces. His nasolabial triangle is rale. In the oropharynx there is a bright-red hyperemic swollen and friable, lacunas contain pus, area with clear margins, the tonsils arc the longue is raspberry pink. The cervical lymph nodes arc enlarged and painful. Diagnose: