While examining colonies of staphylococcus, Dr. Fleming noted that a form called Penicillium notatum contaminated his petri dish. After carefully placing the dishes under a microscope, he was amazed to find that the mold prevented the normal growth of staphylococci.
Later, Fleming grew a fairly strong form and confirmed his conclusions: there was some factor in the Penicillium mold that not only inhibits the growth of bacteria, but which can be used to fight infectious diseases.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.