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Across 1. Discovery of x-rays 3. Co-discovered the structure of DNA 4. British nursing hero during wartime 7. Discovered yellow fever was transmitted by mosquitoes 8. First to understand the heart as a pumping organ 11. Discovered the ABO blood system 16. First studies in treatment of cancers 17. Father of Medicine

Down 2. First microbiologist 5. Introducing the practice of vaccinating small pox 6. Discovering the usefulness of penicillin 9. Founding father of modern genetics 10. Co-discovered the structure of DNA 12. Introduced the principles of antiseptic 13. Inventor of pasteurization 14. Developed the vaccine that helped conquer polio 15. Developed improved methods for straining bacteria