Across
- 3. A substance with no active drug, used in testing new medicines to compare effects (7)
- 4. White blood cells that stay in the body and respond quickly to future infections (6,5)
- 5. A stage of drug testing that uses human volunteers (8,5)
- 7. The correct amount of a drug that should be given (6)
- 11. The first antibiotic discovered (10)
- 14. How harmful a drug is to the body (8)
- 15. Microorganisms that cause disease (9)
- 17. The scientist who discovered penicillin (7)
- 19. Chemicals used on surfaces or skin to kill microbes outside the body (10)
- 20. Drugs used to treat symptoms like pain but do not kill pathogens (10)
Down
- 1. The process of injecting a dead or inactive form of a pathogen to create immunity (11)
- 2. When neither the doctor nor the patient knows who gets the real drug (6,5,5)
- 6. When enough of the population is immune to stop the spread of disease (4,9)
- 8. Cells in the immune system that defend the body against pathogens (5,5)
- 9. Unwanted symptoms caused by a drug (4,7)
- 10. Testing of a drug using cells, tissues or animals before humans (11)
- 12. A protein on the surface of pathogens that triggers an immune response (7)
- 13. Proteins made by white blood cells to help destroy pathogens (10)
- 16. How well a drug works (8)
- 18. Drugs used to kill or prevent the growth of bacteria in the body (10)