Believed in the death theory and enforced hand washing when seeing new patients and touching dead bodies so that you won’t spread any germs to the new patients

Bacteria being able to interact and adapt in their environment as a population than an individual.

resist attack by antibiotics; trap nutrients for bacterial growth and remain in a favorable niche; adhere to environmental surfaces and resist flushing; live in close association and communicate with other bacteria in the biofilm; and resist phagocytosis and attack by the body's complement pathways

Polysaccharide biofilm

Able to protect its self from being eaten by macrophages and also can pass through as a regular cell