began experimenting with the penicillin mold. They took it one step further than Fleming did: they did not just try it topically or in a petri dish, but injected it in live mice. With controlled ...

I was told never to take penicillin again. I’m allergic to many antibiotics, which makes treating me (an elderly person) very challenging. Now my doctor feels that I should be able to take ...

Alexander Fleming’s 1928 discovery of a mold with antibacterial properties was only the first serendipitous event on the long road to penicillin as a life-saving drug. Hannah is an Assistant Editor at ...