A 42-year-old woman from Mumbai presents with a 3-week history of sudden onset of numerous small, raindrop-like erythematous papules distributed over her trunk and proximal limbs. She reports a sore throat 2 weeks prior to the onset of skin lesions. On examination, the lesions are 2–5 mm in diameter, with fine scale, and are distributed in a generalized pattern. She has no prior history of skin disease. What is the most likely diagnosis?