This study analyzes the perceptions of the credibility of fake news regarding COVID-19 and disseminated through social networks in young adults aged 20 to 35 who belong to the socioeconomic group B of Metropolitan Lima, Peru. A significant fraction of this population represents half of the country’s workforce and are household decision-makers. The goal is to determine the elements that contribute credibility to fake news, the factors that enable them to be recognized, and their influence in decision-making on health, vaccination, and prevention practices. The methodological proposal is based on the analysis of fake news verified by the local fact-checker Ojo Biónico and survey technique. I consider the type of fake news that Wardle and Derakhshan (2017) elaborated on in the analysis. The survey includes two exercises to describe the ability to recognize fake news and one exercise for ...