The Vaccines Induced Autoimmunity

Abstract

Vaccines for the past 300 years have played a crucial role in curbing infectious diseases. The development of effective and safe vaccines has significantly reduced morbidity and mortality caused by infectious diseases. Moreover, recent advancements in vaccinology, immunology, microbiology, and genetic engineering have led to novel advancement in vaccine development. This advancement has been quite evident in the current COVID-19 pandemic, where the swift development and approval of vaccines has stopped the spread of SARS-CoV-2 infection. Additionally, the COVID-19 vaccine has saved patients from severe complications and even death. Despite vaccines’ recent advancements and advantages, it would be naïve to believe that vaccines cannot cause adverse reactions. Moreover, evidence suggests vaccines’ involvement in developing inflammatory and autoimmune conditions through molecular mimicry, bystander activation, and cross-reactivity. Additionally, the adjuvants and preservatives added in the vaccine formulations may trigger an autoimmune response. As vaccines are administered to healthy individuals, in many cases to children, any adverse complications can have serious consequences. This chapter mainly focuses on mechanisms of vaccine induced autoimmunity, different vaccines reported for such autoimmune conditions, so that the existing knowledge could help in developing safe and effective vaccines.