The immune system is a system of many biological structures and processes within an organism that protects against disease. To function properly, an immune system must detect a wide variety of agents, known as pathogens, from viruses to parasitic worms, and distinguish them from the organism's own healthy tissue.o function properly, an immune system must detect a wide variety of agents, known as pathogens, from viruses to parasitic worms, and distinguish them from the organism's own healthy tissue.
The cost to run for president in the general election can amount to at least $70 million USD, although the amount of money required can vary. It is possible that at some point in the future, all presidential candidates will run without taking any federal contributions.
It depends in large part on how much a candidate is able to raise. And it can vary wildly, from the candidate who operates on a shoestring budget to the gold-plated, multistate operations of the most serious contenders. As the 2012 campaign gets under way, there have been a lot of numbers thrown around.Some analysts believe that President Obama, who raised and spent about $750 million in the 2008 campaign, will come close to $1 billion this time around â a figure that senior White House officials dispute.ell, in 2008, he announced for president on Feb. 13 and immediately began running television commercials in Iowa and around the nation to increase his name recognition. This time, he may not announce until April or May and so the amount of time he will be on the air will be far shorter.