Valerie van MulukomLotte J. PummererSinan AlperHui BaiVladimira CavojovaJessica FariasCameron S. KayLjiljana B. LazarevicEmilio J. C. LobatoGaelle MarintheIrena Pavela BanaiJakub SrolIris ZezeljCavojova, VladimiraPummerer, Lotte J.Zezelj, IrisBai, HuiFarias, Jessicavan Mulukom, ValerieAlper, Sinan2025-10-0620220277-95361873-534710.1016/j.socscimed.2022.1149122-s2.0-85126963238http://dx.doi.org/10.1016/j.socscimed.2022.114912https://gcris.yasar.edu.tr/handle/123456789/7929https://doi.org/10.1016/j.socscimed.2022.114912Rationale: Belief in COVID-19 conspiracy theories can have severe consequences, it is therefore crucial to understand this phenomenon in its similarities with general conspiracy belief but also in how it is context dependent. Objective: The aim of this systematic review is to provide a comprehensive overview of the available research on COVID-19 conspiracy beliefs and to synthesise this research to make it widely accessible. Methods: We present a synthesis of COVID-19 conspiracy belief research from 85 international articles identified and appraised through a systematic review in line with contemporary protocols and guidelines for systematic reviews. Results: We identify a number of potential antecedents of COVID-19 conspiracy beliefs (individual differences personality traits demographic variables attitudes thinking styles and biases group identity trust in authorities and social media use) their consequences (protective behaviours self-centred and misguided behaviours such as hoarding and pseudoscientific health practices vaccination intentions psychological wellbeing and other negative social consequences such as discrimination and violence) and the effect sizes of their relations with the conspiracy beliefs. Conclusions: We conclude that understanding both the potential antecedents and consequences of conspiracy beliefs and how they are context-dependent is highly important to tackle them whether in the COVID-19 pandemic or future threats such as that of climate change.Englishinfo:eu-repo/semantics/openAccessCOVID-19, Coronavirus, Conspiracy beliefs, Guideline adherence, Vaccine hesitancy, Systematic reviewPUBLIC-HEALTH, TRUST, CORONAVIRUS, GOVERNMENT, ANXIETY, IMPACTVaccine HesitancyCOVID-19CoronavirusConspiracy BeliefsSystematic ReviewGuideline AdherenceReview