By comparing inoculated groups to control groups, researchers suggest that inoculation to misinformation combined with consensus messaging can be effective even if the misinformation is presented up to 7 days later. 

University of Michigan - Ann Arbor

Seeing a positive consensus message (97% of scientists agree that humans are the cause of climate change) and being inoculated against disinformation messages work together to provide long-term resistance to misinformation.  

Consensus Messaging and Inoculation Theory

Maertens, R., Anseel, F., & van der Linden, S. (2020). Combatting climate change misinformation: Evidence for longevity of inoculation and consensus messaging effects. Journal of Environmental Psychology, 70, 101455. https://doi.org/10.1016/j.jenvp.2020.101455

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