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...

The aim of the study is to describe the images that accompanied information about the Covid-19 pandemic, vaccination and treatment of the virus in the following digital news media: ABC, Deia, EITB.eus, El Correo, elDiario.es, El Mundo, La Razón, La Vanguardia, Naiz and Público (2020-2022). A sample of 15,654 single images was studied, of which 15 clusters were identified with Artificial Intelligence techniques, including the algorithm Inception V3. The analysis is based on the combined use of a series of innovative techniques within the field of Communication. This methodology involves a large data set of images, along with the use of AI techniques such as embeddings. We opted for an unsupervised strategy, typical of exploratory and inductive research. Among the results, the identification of different typologies of images used by the medical and health-oriented media, representat...