What is an antigen? Antigen refers to any foreign substance which on entering the body  stimulates the production of antibodies in the body of the  individual as a part of the immune response.
Gen Z Defined. Gen Z consumers range from ages 2 to 19, though the target range for marketers lies from ages 11 to 16. Gen Z is the most diverse and multicultural of any generation in the U.S. -- 55% are Caucasian, 24% are Hispanic, 14% are African-American and 4% are Asian. Gen Z Beliefs.
A Wall Street Journal article from Sept 27 called Pitching 401(k)s To Genration Y Is a Tough Sell by Jennifer Levitz broke down the groups as follows: 1  Gen Y (18-27 years old) 2  Gen X (27-43) 3  Baby Boomer (44-61)  Silent Gen (above 61)