The Accidental Savior: 15 Unique Facts About Alexander Fleming

1. His Messiness Saved the World

Fleming was notoriously untidy, and his lab bench was perpetually cluttered with unwashed petri dishes. In September 1928, he returned from a month-long family vacation to find that he had left a stack of staphylococci cultures uncovered. One of the dishes had grown a patch of mold that was actively destroying the surrounding bacteria. Had Fleming been a neat freak, penicillin might never have been discovered.

2. A Sneeze Led to His First Breakthrough

Before penicillin, Fleming made another massive accidental discovery. While nursing a heavy cold in 1921, a drop of his own nasal mucus fell directly onto a bacteria culture plate. A few days later, he noticed the bacteria around the mucus had dissolved. He had discovered lysozyme, a natural antibacterial enzyme found in human tears, saliva, and mucus that acts as the body’s first line of defense.

3. He Painted Art with Live Germs

Beyond his scientific brilliance, Fleming was a self-taught, highly unusual artist. He became a member of the Chelsea Arts Club and created “germ art.” He would sketch whimsical figures on agar plates and then carefully paint them using different strains of bacteria that he knew would grow into specific, vibrant colors—like bright red, yellow, and purple—timing them perfectly so they would all bloom simultaneously.

4. He Joined St. Mary’s Just for Water Polo

Fleming had his choice of medical schools in London, but his decision came down to athletics. He was an avid water polo player and had previously played a match against the team from St. Mary’s Hospital. He chose to enroll there simply to rejoin his water polo friends, inadvertently placing himself in the exact laboratory where history would eventually be made.

5. Recruited for His Sharpshooting Skills

While studying at St. Mary’s, Fleming intended to become a surgeon. However, the school’s rifle club was desperate to improve its shooting team. Knowing Fleming was a masterful sharpshooter, the club’s captain convinced him to abandon surgery and join the bacteriology department so he could remain at the school and compete on the shooting team.

6. He Did Not Purify Penicillin

While Fleming discovered the mold and its antibacterial properties, he lacked the chemical expertise to isolate and stabilize the active ingredient. After publishing his findings in 1929 to very little fanfare, he essentially abandoned the project. It took two other brilliant scientists, Howard Florey and Ernst Chain, over a decade later to finally turn penicillin into a usable, mass-produced drug.

7. He Predicted Antibiotic Resistance in 1945

When Fleming accepted his Nobel Prize in 1945, his acceptance speech contained a chillingly accurate prophecy. He explicitly warned the global medical community that the careless use of penicillin would teach bacteria how to adapt and become completely resistant to drugs. He practically predicted the modern crisis of MRSA and antibiotic-resistant superbugs decades before it happened.

8. The Myth of the Churchill Rescue

A persistent, widely circulated legend claims that Fleming’s father saved a young Winston Churchill from drowning, and in return, Churchill’s father paid for Fleming’s medical education. Fleming himself grew incredibly tired of this rumor, releasing statements explicitly debunking the story and referring to the entire tale as a “wondrous fable.”

9. Another Churchill Myth Debunked

During World War II, Winston Churchill fell gravely ill with pneumonia in North Africa and was saved by a new wonder drug. The British press patrioticially reported that he was saved by the British-discovered penicillin. In reality, Churchill was cured by a completely different sulfa drug called sulphapyridine, which was discovered by a German laboratory, a fact the press heavily suppressed.

10. He Changed WWI Battlefield Surgery

During World War I, Fleming served in the Royal Army Medical Corps on the Western Front. He noticed that the powerful chemical antiseptics being poured into deep trench wounds were actually killing the soldiers’ white blood cells faster than they were killing the bacteria, leaving the men defenseless against gangrene. His research forced the military to change its surgical protocols entirely.

11. He Was Intensely Modest

Despite receiving global adoration, endless awards, and a knighthood, Fleming despised the intense spotlight. Whenever he was praised as a medical genius who invented the ultimate cure, he would quickly correct the speaker with his trademark dry humility, stating: “I did not invent penicillin. Nature did that. I only discovered it by accident.”

12. His Mold Was Misidentified

For years after his discovery, the specific strain of mold in Fleming’s laboratory was incorrectly classified in medical journals as Penicillium rubrum. It wasn’t until an expert mycologist later examined the famous fungal strain that it was accurately identified as Penicillium notatum.

13. High Ranks in Freemasonry

Outside the laboratory, Fleming was a highly active and dedicated Freemason. He joined his first lodge in London in 1909 and remained passionately involved in the secretive fraternal organization for his entire life, eventually rising to become the Past Grand Senior Warden of the United Grand Lodge of England.

14. He Loved the Theater

While he appeared serious and quiet to his colleagues, Fleming possessed a vibrant, hidden social life. In his younger years, he was deeply passionate about the theater and frequently participated in amateur dramatic societies. His colleagues often noted that he had a wicked, highly sophisticated sense of humor that only came out when he was entirely comfortable.

15. A Hero’s Burial in St. Paul’s

When Sir Alexander Fleming died of a sudden heart attack in 1955, the British government recognized the staggering magnitude of his contributions to humanity. He was denied a simple, quiet burial and was instead interred in the crypt of St. Paul’s Cathedral in London, resting permanently alongside Britain’s most legendary historical figures, including Lord Nelson and the Duke of Wellington.