Public health. Hygiene. Preventive Medicine 31 Communicable diseases and public health 23 RA Public aspects of medicine 7 Travel and state. Tourism 6 Epidemics 5 Food and food supply in relation to public health 4 Medical education. Medical schools. Research 4 Health behavior and habits 3 Travel and the state. Tourism 3 WA Public Health 3 Examination and analysis. Composition. Adulteration 2 H Social Sciences (General) 2 Hospitality industry. Hotels, clubs, restaurants, etc. Food service 2 Immunologic diseases. Allergy 2 Infectious and parasitic diseases 2 Mental health. Mental illness prevention 2 Preventive dentistry 2 Primary Health Care 2 R Medicine (General) 2 Statistical methods 2 Vaccinotherapy. Vaccines 2 Virology 2 AIDS. HIV infections 1 Academies and learned societies (General) 1 Analysis 1 Application software 1 Architecture in relation to special subjects 1 Bacteria 1 Child Health. Child health services 1 Computer applications to medicine. Medical informatics 1