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.
There's are reasons why Gen X is so often ignored, said Taylor. There are fewer of them: Just 65 million, compared to 77 million Boomers and roughly 83 million Millennials. And they span just 16 years, whereas most generations encompass two decades.