Transition Zone - The area, sometimes referred to as an ecotone, encompassing the edges of two distinct ecosystems, such as the area where a forest intersects with grassland.⏎
Strain - A genetic variant or specific subtype of a microorganism, such as a virus or bacteria.⏎
Urogenital Disease - Disease of the organs involved in the excretion of fluids and reproduction.⏎
Vector - An organism (usually an arthropod such as a flea, mosquito, or tick) that carries an infectious agent from one host to another.⏎
Universal Flu Vaccine - A vaccine that is effective against all forms of the influenza virus.⏎