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30 Revolutionary Medical Trivia Questions and Answers

By Stefanie·Updated Oct 2025·4 min read
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  1. 1In what year did the World Health Assembly declare smallpox eradicated worldwide?

  2. 2Who performed the first successful vaccination and in what year?

  3. 3Who discovered the ABO blood groups, making safe transfusion possible?

  4. 4Which discovery in 1928 revolutionized treatment of bacterial infections?

  5. 5What is the leading global cause of death today?

  6. 6What is the most abundant protein in the human body?

  7. 7What is the largest organ of the human body?

  8. 8What is the longest bone in the human body?

  9. 9Which blood type is the universal red cell donor?

  10. 10Which blood type is the universal red cell recipient?

  11. 11How many bones are in a typical adult human skeleton?

  12. 12Which solid organ uniquely regenerates to restore its original mass?

  13. 13Who first isolated insulin for diabetes treatment and when?

  14. 14What were the first widely used systemic antibacterial drugs before penicillin?

  15. 15For how long should you scrub when washing hands with soap and water?

  16. 16Deficiency of which vitamin causes scurvy?

  17. 17Deficiency of which vitamin causes rickets in children?

  18. 18What is the most common nutritional cause of anaemia worldwide?

  19. 19What is the heart’s natural pacemaker?

  20. 20What is the smallest bone in the human body?

  21. 21Tenderness at which point is a classic sign of appendicitis?

  22. 22Which imaging modality does not use ionizing radiation to make images?

  23. 23Do antibiotics treat viral infections like colds or flu?

  24. 24What are the two most common causes of peptic ulcers?

  25. 25What temperature range is generally considered normal for adult body temperature?

  26. 26When and where was the first successful human organ transplant performed?

  27. 27What infection is the necessary cause of nearly all cervical cancers?

  28. 28How much folic acid should people capable of pregnancy get daily to help prevent neural tube defects?

  29. 29Which hormone from the pineal gland helps regulate the sleep–wake cycle?

  30. 30What cancer currently causes the most deaths worldwide?

Answer Key

  1. 1. 1980On May 8, 1980, the 33rd World Health Assembly formally declared the world free of smallpox.
  2. 2. Edward Jenner, 1796Jenner inoculated James Phipps with cowpox material, laying the foundation of vaccination.
  3. 3. Karl LandsteinerLandsteiner identified major human blood groups in 1900–1901, earning the 1930 Nobel Prize.
  4. 4. PenicillinFleming’s observation in 1928 led to penicillin’s clinical use by the early 1940s.
  5. 5. Cardiovascular diseaseWHO reports ~19.8 million CVD deaths in 2022, remaining the top killer worldwide.
  6. 6. CollagenIt constitutes roughly 30% of total protein mass in mammals.
  7. 7. SkinHuman skin (integument) is the body’s largest organ.
  8. 8. FemurAnatomical references identify the femur as the longest human bone.
  9. 9. O negativeThe American Red Cross identifies O- as the universal red cell donor type.
  10. 10. AB positiveAB+ patients can receive red cells from all ABO/Rh types.
  11. 11. 206MedlinePlus notes 206 bones in the adult skeleton.
  12. 12. LiverNIH and reviews describe the liver’s exceptional regenerative capacity.
  13. 13. Frederick Banting and Charles Best, 1921Their work led to life-saving insulin therapy and a 1923 Nobel Prize (to Banting and Macleod).
  14. 14. Sulfonamides (sulfa drugs)<br/Discovered in the 1930s (e.g., Prontosil), they became widely used by the 1940s.
  15. 15. At least 20 secondsCDC recommends a 20-second scrub to effectively remove germs.
  16. 16. Vitamin C (ascorbic acid)NIH ODS details scurvy signs and the role of vitamin C deficiency.
  17. 17. Vitamin DNIH ODS notes rickets in children and osteomalacia in adults due to vitamin D deficiency.
  18. 18. Iron deficiencyWHO identifies iron deficiency as the most common nutritional cause of anaemia.
  19. 19. The sinoatrial (SA) nodeIt initiates electrical impulses that set heart rhythm.
  20. 20. Stapes (in the middle ear)Anatomy texts cite the stapes as the tiniest bone (~3 mm long).
  21. 21. McBurney’s point (right lower quadrant)Merck Manual describes RLQ tenderness at McBurney’s point as classic.
  22. 22. MRIMRI uses strong magnetic fields and radiofrequency waves, not ionizing radiation.
  23. 23. NoCDC and FDA emphasize antibiotics don’t work against viruses.
  24. 24. Helicobacter pylori infection and NSAID useNIDDK identifies H. pylori and NSAIDs as the leading causes.
  25. 25. About 97–99 °F (36.1–37.2 °C)Cleveland Clinic notes normal variation; 98.6 °F is an average, not a fixed point.
  26. 26. Kidney transplant, Boston, December 23, 1954Joseph Murray’s team transplanted a kidney between identical twins.
  27. 27. Persistent infection with high-risk human papillomavirus (HPV)WHO notes persistent high-risk HPV as the cause; vaccination and screening prevent disease.
  28. 28. 400 micrograms (mcg)CDC recommends 400 mcg/day before and during early pregnancy.
  29. 29. MelatoninMelatonin from the pineal gland plays a central role in circadian rhythm regulation.
  30. 30. Lung cancerWHO cites lung cancer as the leading cause of cancer death globally.

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