70 years ago doctors could cure infections the situation was very different 70 years ago alxander fleming developed penicilli all bacteria became resistant to penicillin after a few years the first trial of penicillin was on rats
70 years ago doctors could cure infections the situation was very different 70 years ago alxander fleming developed penicilli all bacteria became resistant to penicillin after a few years the first trial of penicillin was on rats