Antibiotics Were Not Discovered?

September 23, 1928,  Dr. Alexander Fleming discovered an antibiotic, later on identified and known as penicillin, by accident. While trying to clean the clutter of his lab bench, he looked at petri dishes inoculated with a specific bacterium. One plate, he noted, had a mold growth on it and a zone of clearing  was noted around the mold. The zone of clearing was thought to be a region where bacterial growth was prevented by the substance produced by the mold.

Today, management and treatment of infections rely very heavily on antibiotic use. Antibiotics are also given to surgery or to other patients to proactively prevent infection. A wide range of antibiotics are now available. Unfortunately though, the unnecessary use of these antibiotics may ironically lead to the lose their efficacy against target microorganisms

Without the discovery of antibiotics, humanity would suffer massive loss of lives due to infections by different microorganisms.