Infectious disease means any infectious disease classified in Group 1 infectious diseases, Group 2 infectious diseases, Group 3 infectious diseases, Group 4 infectious diseases, Group 5 infectious diseases, designated infectious diseases, infectious diseases under surveillance by the World Health Organization, infectious diseases spread through bioterrorism, sexually transmitted infectious diseases, zoonoses, and nosocomial infectious diseases The practice of washing hands the right way and cough etiquette is the most basic means of preventing the spread of infectious diseases, preventing about 50-70% of infectious diseases