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  1. Laboratory vessels on drying rack
  2. Normal neck, X-ray
  3. Scanning electron micrograph of Staphylococcus and a dead human neutrophil
  4. Arthritis of the knee, X-ray
  5. Arteries of the brain, 3D CT scan
  6. DNA
  7. Blue liquid being dropped into a beaker of clear water
  8. Foxglove flowers
  9. Caduceus and graph
  10. Pair Of Contact Lenses
  11. Stethoscope
  12. Barbara McClintock, in her laboratory at Cold Spring Harbor, New York, in 1947
  13. Dentistry equipment
  14. Spanish Flu Nursing Ward, 1918
  15. Penicillin magnified 600x
  16. Assorted capsules and gel-caps
  17. Stack of petri dishes with bacterial cultures
  18. Syringe
  19. Blood analysis
  20. Forensic bone analysis
  21. Blood samples
  22. Bacteria infecting a macrophage, SEM
  23. Surgeon in operating room
  24. Antibiotic research
  25. Surgeon with arms crossed
  26. Microbiology research
  27. Bacterial contamination tests