- Virology 7
- Chemistry/Food Science, general 5
- Food Science 5
- Atmospheric Protection/Air Quality Control/Air Pollution 3
- Climate Change/Climate Change Impacts 3
- Environment, general 3
- Hydrogeology 3
- Soil Science & Conservation 3
- Water Quality/Water Pollution 3
- Infectious Diseases 2
- Medical Microbiology 2
- Veterinary Medicine/Veterinary Science 2
- Zoology 2