1 nov 1921 ano - Alexander Fleming (1881-1955) was a bacteriologist
and a doctor who was the pioneer of penicillin
and lysozyme. On Nov 1921, Fleming discovered
lysozyme while dealing with a cold. He had a drop
mucus from his nose onto a number of bacteria.
After a few weeks, he discovered that the bacteria has dissolved.
This was Alexander Fleming's first discovery to
the human immune system.
