Who Was One of the First to Question Person-To-Person Transmission

question 22

Short Answer

Who was one of the first to question person-to-person transmission of yellow fever?

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Definitions:

Million Years

A unit of time equal to one million years, often used to describe geological and evolutionary time scales.

Bilateral Symmetry

A body shape with right and left halves that are approximately mirror images of each other. Compare with radial symmetry.

Cephalization

The evolution of a head; the concentration of nervous tissue and sense organs at the front end of the animal.

Natural Selection

The process by which organisms that are better adapted to their environment survive and reproduce more successfully than less well-adapted organisms.