The current media context is characterized as a hybrid system in which old and new actors coexist and, at the same time, compete for their hegemony in the media sphere. In this context, Covid-19 has generated an “infodemic” or information overexposure that has made it difficult for citizens to access reliable sources and guidance. Therefore, the main objective of this article is to characterize the political, institutional and media actors who have reported on Twitter about vaccines and immunization processes during the Covid-19 pandemic in five Ibero-American countries: Argentina, Brazil, Chile, Spain and Mexico. To this end, a total of 68,822 tweets from 84 accounts belonging to the country's presidents, the official accounts of governments, health authorities and their spokespersons, and the main media have been analyzed. The results indicate that the most intense activity and the...

Purpose. This article analyses a pioneering radio experiment in the use of artificial intelligence (AI) conducted by the Basque public broadcaster in Basque, Euskal Irrati Telebista (EiTB), located in Spain. The initiative involved automating the generation of news texts and cloning human voices for news narration in the program Faktoria. Methodology. The research combines qualitative and quantitative methodologies to assess the detectability of automated content by the audience, as well as the perceptions and attitudes of listeners and media professionals towards the use of this technology. Results and conclusions. The results show that most listeners did not detect the presence of AI in the aired pieces, suggesting a high degree of technological mimicry. However, emotional values attributed to the automated voice, such as closeness and involvement, received lower ratings, indicating an...