Across
- 1. instances
- 5. transfer
- 6. defend
- 9. necessary apparatus
- 11. alternative
- 14. peak physical and mental condition
- 15. artisan
- 16. posses power
- 19. provides active acquired immunity
- 20. take measure to check quality
Down
- 2. left in vulnerability
- 3. make sterile
- 4. absolutely necessary
- 7. frequency of occurrence
- 8. answer
- 10. causes diseases
- 12. 4th letter in Indo-European Language
- 13. crack, bang
- 16. amount
- 17. watchdog
- 18. fabric gauze and fitting over the nose and mouth
