Epidemiology Epidemiologic Methods 12 Plant diseases 10 Human diseases 9 Man 8 Public health 8 Viral, Bacterial and Fungal Diseases of Plants, (New March 2000) 8 Diseases 6 Host Resistance and Immunity 6 Pathogen, Pest, Parasite and Weed Management (General) 6 Plant pathogens 6 Statistical methods 6 Communicable diseases 5 Diagnosis 5 Disease control 5 Disease resistance 5 Horticultural Crops, (New March 2000) 5 Medical statistics 5 Plant disease control 5 Plant pathology 5 Prion, Viral, Bacterial and Fungal Pathogens of Humans, (New March 2000) 5 Protozoan, Helminth and Arthropod Parasites of Humans, (New March 2000) 5 Clinical aspects 4 Diagnosis of Animal Diseases, (New March 2000) 4 Diagnostic techniques 4 Drug therapy 4 Genetics and Molecular Biology of Microorganisms, (New March 2000) 4 Geographical distribution 4 Health Economics, (New March 2000) 4 Immunology 4