Prozac is a brand name medication containing the active ingredient Fluoxetine. It is a drug that belongs to the group of selective serotonin reuptake inhibitors. This drug affects chemical in brain that are either unbalanced or cause depression, pain and anxiety.
In laymen terms, Paradigm Shift is a popular, or perhaps, not so popular shift or transformation of the way we Humans perceive events, people, environment, and life altogether. It can be a national or international shift, and could have dramatic effects -- whether positive or negative-- on the way we live our lives today and in the future.
Antigenic shift is the process by which two or more different strains of a virus, or strains of two or more different viruses, combine to form a new subtype having a mixture of the surface antigens of the two or more original strains.(think influenza, happens in pigs and birds) What is antigenic drift.