By Zachary Stieber A lower level of antibodies against the Omicron virus variant is triggered by COVID-19 vaccines, researchers said in a new study. Using blood samples from people who received two doses of the Oxford-AstraZeneca vaccine or the Pfizer-BioNTech jab, researchers with the University of Oxford found “a substantial fall” in neutralizing antibodies, with evidence of […]
Tag: Natural Immunity
Naturally acquired active immunity occurs when a person is exposed to a live pathogen and develops a primary immune response, which leads to immunological memory. This type of immunity is “natural” because it is not induced by deliberate exposure [dubious – discuss]. Many disorders of immune system function can affect the formation of active immunity such as immunodeficiency (both acquired and congenital forms) and immunosuppression.
