Vaccination versus natural infection: A review of antibody differentiation techniques

The production of specific antibodies occurs in response to pathogens, whether encountered naturally or introduced through vaccination, serving as markers of immunity. As novel vaccines are developed and deployed, especially in response to emerging infectious diseases, the ability to distinguish between vaccine-induced and infection-induced antibodies becomes increasingly important. Vaccines are designed to mimic this natural infection process without causing the disease itself. Serological assays are critical tools in immunology, enabling researchers and clinicians to differentiate between antibodies produced by vaccination and those generated by natural infection. By understanding whether an individual's antibodies are the result of previous infection or vaccination, healthcare providers can modify booster recommendations more effectively. It also plays an important role in identifying people with hybrid immunity and in assessing the effectiveness of vaccination campaigns.