Abstract: Antibodies are essential for protection against various infectious diseases and are the effector arm of most vaccines. In fact, high levels of protection are generally conferred by these molecules, which are among the most stable proteins in nature. The discovery of monoclonal antibodies (mAbs) in 1975 by Köhler and Milstein enabled a significant advancement in biomedical research, as thousands of specific antibodies for different molecules were developed and used for their detection in various study models. The use of mAbs has also greatly improved the quality and speed of diagnostic tests for numerous diseases. Furthermore, the use of mAbs in treatments began with murine mAbs, evolved to chimeric mouse/human mAbs, and today includes humanized or fully human mAbs. mAb-mediated therapies are present in the treatment of different types of cancers, infectious diseases, transplants, allergies, asthma, and even autoimmune diseases. The main therapeutic advantages of using mAbs are their high specificity, high affinity with which they bind to their targets, and limited side effects associated with their use. Over the past decade, our research group has been dedicated to producing and using mAbs in vaccination and treatment strategies for different infectious diseases. The use of chimeric mAbs capable of directing antigens of interest to conventional dendritic cells (cDCs) has shown great promise for the development of vaccines against malaria, dengue, and cancer caused by the human papillomavirus (HPV). Our studies have demonstrated that these chimeric antibodies, targeted to two distinct DC subpopulations (cDC1 and cDC2), when administered in the presence of adjuvants that stimulate their maturation, are potent immunogens capable of inducing long-lasting cellular and humoral immune responses against the antigen of interest. More recently, we have been able to produce human mAbs specific for the treatment of infections caused by the dengue virus (DENV), Zika virus (ZIKV), and SARS-CoV2. Our long-term goals are to strengthen studies using chimeric mAbs that direct antigens to cDCs, with an emphasis on HPV and malaria models, to evaluate the immunological mechanisms involved in protection in experimental models. We also intend, in a more applied context, to study the protective effect during pregnancy of a fully human anti-ZIKV mAb that was able to protect animals of a highly susceptible strain (AG129) from a lethal challenge with ZIKV, in addition to obtaining fully human mAbs against the infective form of Plasmodium vivax.