Measles, Mumps, Rubella — Virology

A 7-year-old boy from rural Maharashtra presents with a 3-day history of fever, cough, and coryza. On examination, he has a maculopapular rash that started on the forehead and hairline and has spread downward to involve the trunk and limbs. Koplik spots are noted on the buccal mucosa opposite the molars. His vaccination status is unknown. What is the most likely diagnosis?

A 5-year-old girl from Delhi presents with bilateral parotid swelling, fever (38.5°C), and difficulty eating for the past 2 days. She has no history of vaccination. On examination, the parotid glands are tender and swollen bilaterally. There is no rash. Serum amylase is elevated at 120 U/L (normal <100 U/L). What is the most likely viral diagnosis, and what is the most common serious complication in post-pubertal males?

Which of the following is the correct classification of measles virus according to the Baltimore classification system?

Rubella virus is classified in which viral family, and what is its genome polarity?