Suburbanization - The process of land conversion and development around the periphery of major cities.⏎
Strain - A genetic variant or specific subtype of a microorganism, such as a virus or bacteria.⏎
Toxin - A poisonous substance, often a protein, produced by the metabolic processes of living cells or organisms that can cause disease if introduced into the body.⏎
Vector - An organism (usually an arthropod such as a flea, mosquito, or tick) that carries an infectious agent from one host to another.⏎