I was speaking more generally, not about penicillin in particular.
Ping to #457, so don't get your panties in a bunch Amish.
OK...could you specify, oh, half a dozen medical breakthroughs that we should blame directly and obviously on trained mathematicians, rather than trained medical biologists, such as Fleming, Pauling, or Pasteur? Could you perhaps identify the mathematicians who were directly responsible for Pasteur's germ theory of disease? Pauling's (a chem major) major breakthroughs?