Laura Mourlot Rodríguez Laura Mourlot Rodríguez http://www.revistadecomunicacionysalud.es/index.php/rcys Revista de Comunicación y Salud 2173-1675 XXXX-XXXX http://doi.org/10.35669/rcys.2020.10(1).67-90 Analysis of pro-vaccine and anti-vaccine content published on YouTube, Facebook and internet ANÁLISIS DEL CONTENIDO PUBLICADO EN YOUTUBE, FACEBOOK E INTERNET SOBRE VACUNAS Y ANTI VACUNAS Piqueiras Paloma

PhD with International Mention in Audiovisual Communication, Advertising and Public Relations, Master in Organisational Communication and Degree in Journalism from the Complutense University of Madrid (UCM). She is currently a postdoctoral researcher and lecturer at the UCM. Member of the Research Group "Intangibles in the Public Sector" and of the Academic Committee of the Association of Political Communication (ACOP). Previously, she has worked at Cadena COPE and in the Communication Department of Siemens Healthineers España.

Orcid ID: https://orcid.org/0000-0002-1485-8812

1 De Marchis Giorgio gmarchis@ucm.es

Graduate in Information Sciences, Psychology, and Economics and Business Studies and Associate Professor at the Complutense University of Madrid. His current studies focus mainly on psychological mechanisms related to memory, branding, and the effects of mentoring in organisations. He has published in prestigious journals such as Computers in Human Behavior, Cognitive Processing, or Measuring Business Excellence. He is a member of the research group "Sentiment and popularity of pro- and anti-vaccine messages in networks: analysis of explicit and implicit responses using EEG, GSR, face recognition and eye-tracking". Before joining the academic world, he worked in the communication sector, especially in advertising and film. He is the founder of the Junior Communication Agency El Estudio at UCM, of which he was the Dean's Delegate until recently.

Orcid ID: https://orcid.org/0000-0001-9217-3141

1 Cuesta Díaz Victoria victoria.cuesta.diaz@gmail.com

PhD in Nursing from the Complutense University of Madrid with outstanding cum laude, she is currently a specialist nurse in the Neonatal ICU of the Hospital Quirón Salud in Madrid. Former lecturer on the Master's Degree in Communication and Health at the Complutense University. Lecturer-tutor of nursing students in hospital internships at the Francisco de Vitoria University at the Quirón Salud Hospital in Madrid in the critical neonatal area. Author of several articles and book chapters on communication and health.

Orcid ID: https://orcid.org/0000-0003-1318-1173

2 Universidad Complutense de Madrid España Hospital Quirón de Madrid España 2 6 2020 10 1 67 90 16 3 2020 2020

This article analyses the information about vaccines and anti-vaccines that is shared on blogs, Facebook, and YouTube by monitoring publications from 2015 to the present. The origin of the source of the information, the published content, and the generated engagement have been taken into account. The results, obtained from the study of 48 YouTube videos, 207 posts from 5 different blogs and 7 Facebook groups, confirm that: a) the anti-vaccine or pro-vaccine information does not usually come from official sources; b) the shared content orbits around certain recurring issues and it is usually linked to specific events (for example, a measles outbreak or a particular complaint for side effects of a vaccine); c) the shared content, generally, is not based on scientific evidence, and; d) the interactions generated by users vary greatly depending on whether the information is transmitted by YouTube, a blog, or Facebook. Generally, both blogs and YouTube generate more followers, interactions, and comments than Facebook groups.

ANÁLISIS DEL CONTENIDO PUBLICADO EN YOUTUBE, FACEBOOK E INTERNET SOBRE VACUNAS Y ANTI VACUNAS

Resumen

En este artículo se investiga la información sobre vacunas y anti vacunas que es compartida en blogs, Facebook y YouTube mediante la monitorización de publicaciones desde el año 2015 hasta la actualidad. En el análisis se ha tenido en cuenta el origen de la fuente emisora de la información, el contenido publicado, y el impacto generado. Los resultados, obtenidos del estudio de 48 vídeos de YouTube, 207 post de 5 blogs distintos y de 7 grupos de Facebook, muestran que: a) la información anti vacuna o pro vacuna encontrada en la red no suele provenir de organismo oficiales; b) el contenido compartido gira en torno a ciertos temas recurrentes y suele estar ligado a hechos puntuales (por ejemplo, un brote de sarampión o una denuncia particular por efectos secundarios de una vacuna); c) el contenido compartido carece, mayoritariamente, de carácter científico y; d) las interacciones generadas por parte de los usuarios varían mucho dependiendo de si la información es transmitida por YouTube, un blog, o Facebook. Generalmente, tanto los blogs como YouTube generan más seguidores, interacciones, y comentarios que los grupos de Facebook.

Vaccines Health Communication Facebook YouTube Internet Vacunas Comunicación de salud Facebook YouTube Internet. La Universidad Complutense y Santander Universidades, con el objetivo de contribuir a la promoción y mejora de la calidad de la educación superior y de la actividad investigadora, colaboran de forma conjunta en el programa de formación de investigadores y doctores al que pertenece Paloma Piqueiras.