Epidemiology 120 Epidemiologic Methods 24 Epidemiology and preventive medicine 23 Public health 12 Diseases 10 Human diseases 10 Plant diseases 10 Man 9 Viral, Bacterial and Fungal Diseases of Plants, (New March 2000) 8 Diagnosis 7 Plant pathology 7 epidemiology 7 Communicable diseases 6 Disease control 6 Host Resistance and Immunity 6 Molecular epidemiology 6 Pathogen, Pest, Parasite and Weed Management (General) 6 Plant pathogens 6 Protozoan, Helminth and Arthropod Parasites of Humans, (New March 2000) 6 Public Health 6 Statistical methods 6 Disease Outbreaks 5 Disease resistance 5 Horticultural Crops, (New March 2000) 5 Medical statistics 5 Plant disease control 5 Prion, Viral, Bacterial and Fungal Pathogens of Humans, (New March 2000) 5 Research 5 Taxonomy 5 Taxonomy and Evolution 5