2313 박현정

[2313 박현정]

The person I would like to introduce today for the public good is Sir Alexander Fleming, a famous Scottish biologist who changed the history of medicine. Now, I am going to introduce the remarkable achievements that had been made by Fleming before modern medicine was fully established, and I hope that after hearing this story, you will understand how scientific devotion can save humanity.

In the early 20th century, bacterial infections were extremely deadly. Before penicillin was discovered, simple wounds had been considered life-threatening conditions because doctors lacked effective tools to kill bacteria inside the human body. During World War I, numerous soldiers survived severe gunshot wounds, but far more soldiers had been killed by secondary bacterial infections in unsanitary field hospitals. Witnessing this tragic situation, Fleming decided to devote himself to researching antibacterial substances that could target harmful pathogens without damaging normal human cells.

Fleming's breakthrough came in 1928 through meticulous observation. While studying Staphylococcus bacteria in his laboratory, he noticed that a blue mold, Penicillium, had contaminated one of his culture plates. Before this discovery, contaminated culture plates had been thrown away by researchers as ruined experiments. However, Fleming himself carefully examined the plate and observed that bacteria could not grow around the mold. He realized that the mold produced a chemical compound that destroyed the bacterial cell walls.

Fleming himself isolated the active substance and named it penicillin, marking the beginning of the antibiotic era in biomedical science. Thanks to his discovery, dangerous infectious diseases like pneumonia and diphtheria could finally be cured. Furthermore, Fleming himself refused to patent penicillin for personal profit, choosing instead to share it with scientists worldwide so that millions of people could receive affordable treatment.

Today, we learned about Alexander Fleming, who worked tirelessly for the public good. His achievements transformed life science and healthcare forever. I admire Fleming because he himself chose scientific contribution over wealth, saving countless lives through his research. Inspired by his spirit, I also want to contribute to society by pursuing life sciences in the future.