What do the characters mean in Osmosis Jones?

In "Osmosis Jones," the characters represent various elements of the human body and its immune system. Frank, the human host, embodies the everyday lifestyle choices that affect health, while Osmosis Jones, a white blood cell, symbolizes the body’s defenses against disease. Thrax, the virus, represents the threats that can invade and harm the body. Together, they illustrate the internal battle between health and illness, emphasizing the importance of maintaining a balanced lifestyle to support the body's defenses.