The Magic Bullet
In 1901 Alexander Fleming enters medical school at St. Mary's hospital in London. In 1928 Fleming identifies penicillin. Only one year later in 1929 Fleming publishes his first report in penicillin's antibacterial properties.
In 1940 the y published results from their experiments on mice, showing, among other things, that penicillin appeared nontoxic and could combat a variety of pathogens. By 1943 penicillin was ready to be used on a large scale.