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.
But Gen Z is the first generation born into a digital world. They don't know a world without PCs, mobile phones, gaming devices and MP3 players. They live online, sharing details of their lives across dozens of platforms and dictating what they like and dislike with a tweet, post or status.