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.
Gen X leaders (of which we have a notable example in our own President Obama) are pragmatic, cunning, and hard to fool; they've seen it all and aren't much for bullshit. Generation Y is used to refer to people born in the 80s and 90s.