Non-communicable disease - diseases that cannot be transmitted from one person to another
Pathogens - microorganisms that can cause disease
Immune system - the body's defense mechanism against pathogens
Tumor - an abnormal growth of cells
Blood-borne - transmitted through the blood
Indirect contact - transmission of disease through intermediate objects or surfaces
Direct contact - transmission of disease through physical contact
Insulin - a hormone that regulates blood sugar levels
Communicable disease - diseases that can be transmitted from one person to another
Air-borne - transmitted through the air.