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Original Antigenic Sin — The Hidden Danger of COVID Shots

Understanding Original Antigenic Sin

The following description of original antigenic sin was published in a January 2019 Journal of Immunology paper titled “Original Antigenic Sin: How First Exposure Shapes Lifelong Anti–Influenza Virus Immune Responses”:

“The term ‘original antigenic sin’ (OAS) was first used in the 1960s to describe how one’s first exposure to influenza virus shapes the outcome of subsequent exposures to antigenically related strains. In the decades that have passed, OAS-like responses have been shown to play an integral role in both protection from and susceptibility to infections.

OAS may also have an important deterministic role in the differential efficacy of influenza vaccine responses observed for various age cohorts across seasons …

OAS describes the phenomenon whereby the development of immunity against pathogens/Ags is shaped by the first exposure to a related pathogen/Ag … subsequent infections with similar influenza virus strains preferentially boost the Ab response against the original strain …