Who is Breckinridge from World War Z and what is their importance?

Breckinridge is one of the most disturbing characters in the story, Scott is a hated man throughout the world. Following an incorrect naming of the plague "African rabies," Scott and his business partners develop the Phalanx, a vaccine for rabies. Knowing the product won't work, and knowing his false drug is causing death, Scott nonetheless continues his quest for money, regardless of the cost to human life. His character is clearly at ease with himself, and blames only the consumer, who he believes is at fault for being stupid enough to take the vaccine. His character in the novel represents those individuals in any crisis who prey on the hopes and weaknesses of human kind to make themselves wealthy or powerful. As a coward, he has fled to the Antarctic, and lives in complete solitude.