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.
The end of the Millennial generation and the start of Gen Z in the United States are closely tied to September 11, 2001. That day marks the number-one generation-defining moment for Millennials. Members of Gen Zâborn in 1996 and afterâcannot process the significance of 9/11 and itâs always been a part of history for them.