The document discusses common and dangerous diseases that affect children. It provides details on 3 dangerous diseases - measles, polio, and tuberculosis (TB). For each disease, it describes symptoms, spread, treatment, and importance of vaccination. Measles causes fever and rash, and risks pneumonia or TB later. Polio causes fever and muscle pain, and may cause paralysis. TB risks meningitis or affecting other organs if resistance is low. Vaccines for measles, polio, and BCG for TB are recommended to protect children against these illnesses.