This document discusses common infectious diseases, how they are transmitted, their symptoms, and ways to prevent them. It covers 8 common infectious diseases including mumps, SARS, hepatitis A, cholera, chicken pox, conjunctivitis, dengue fever, and influenza. Diseases can be transmitted via person-to-person contact, food, droplets from coughs/sneezes, or animals. Symptoms vary but include fever, coughing, vomiting, and rashes. The document recommends getting vaccinations, practicing good hygiene, and avoiding contact with infected individuals. It also outlines preventive measures taken by governments like vaccinations, food inspections, hygiene education, and pest control.