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  1. Scanning electron micrograph of a human neutrophil ingesting MRSA
  2. Scanning electron micrograph of Staphylococcus and a dead human neutrophil
  3. Cells from a urine infection, SEM
  4. Microscopic view of coronavirus
  5. Scanning electron micrograph of HIV particles infecting a human H9 T cell
  6. Bacteria infecting a macrophage, SEM
  7. Colorized image of HIV-infected H9 T-cell
  8. Microscopic view of the common cold virus
  9. Microscopic view of bacteria
  10. H1N1 flu virus particle, artwork
  11. Virus particles, artwork
  12. E. coli bacteria, SEM
  13. Colorized scanning electron micrograph of filamentous Ebola virus particles
  14. Pseudomonas aeruginosa bacteria, SEM
  15. Oral Streptococcus Bacteria, SEM
  16. Anaerobiospirillum thomasii flagella, TEM
  17. Microscopic view of human antibodies with red blood cells
  18. Microscopic view of Giardiasis
  19. Enterococcus faecalis bacteria, SEM
  20. Conceptual image of influenza causing flu
  21. Bacteria infecting macrophage cells, SEM
  22. Conceptual image of plasmodium causing malaria
  23. Hepatitis C virus, molecular model
  24. Conceptual image of flagellate bacterium
  25. Microscopic view of cell and virus
  26. Artistic representation of the immune system's reaction to bacteria invading the tissues
  27. Conceptual image of the coronavirus
  28. Anthrax bacteria
  29. Microscopic view of virus
  30. Bacteria infecting a macrophage, SEM
  31. Microscopic viruses floating in an environment
  32. Group of Escherichia coli bacteria cells, known as E. Coli
  33. Group of H5N1 virus with glassy view
  34. Salmonella, TEM
  35. Influenza C virus, TEM