1. Introduction to infectious disease -- 2. The germ theory paradigm 3. Host-microbe interactions and infectious disease -- 4. Viruses -- 5. Bacteria -- 6. Protozoa -- 7. Helminths -- 8. Fungi -- 9. Vertebrate immune system -- 10. Immunity in invertebrates, plants, and prokaryotes -- 11. Evasion and suppression of immunity -- 12. Vaccines, vaccination, and immunization -- 13. Microbiomes -- 14. Antimicrobial resistance -- 15. Vector biology -- 16. Epidemiology and SIR models -- 17. Evolution of pathogenicity and virulence -- 18. Disease ecology and emergence -- 19. The COVID-19 pandemic: A case study -- Index.