Despite evidence about the informal advisors of the presidents in Latin America, literature on this topic is still incipient. This article investigates the informational scenario that surrounded the Brazilian president, Jair Bolsonaro, from January to April 2020, a period of presidential decision-making on the measures to face the Covid-19 pandemic. In-depth case study of interactions established by the Brazilian president is developed based on data from the Brazilian President’s Daily Diary. Social Network Analysis (SNA) tools are used to analyze this evidence. The findings suggest that the Ministry of Health (MOH) was not the main information channel for the president at the beginning of the pandemic despite its central role in the national governance structure of public health emergencies. In addition, the analysis shows the president's choice to use the structures of the Presidency as main informational support, including strengthening them through unilateral administrative measures. Finally, the results indicate that there is no evidence that the president combined formal and informal advisory as a strategy to access alternative information to the MOH. The findings should be pondered regarding the partly reliable nature of the President’s Daily Diary as a source of relational data. The study provides a conceptual and methodological framework to identify and measure the presidential informal advisory strategy, contributing to the advance of research on presidential advising in Latin America.  A pesar de las evidencias sobre los asesores informales de los presidentes en América Latina, la literatura sobre el tema aún es incipiente. Esteartículo investiga el escenario informativo que rodeó al presidente brasileño,Jair Bolsonaro, de enero a abril de 2020, un período de toma de decisionespresidenciales sobre las medidas para combatir la pandemia de Covid-19. Paraeso, se realiza un estudio de caso de las interacciones establecidas por el presidente brasileño basado en los registros de la Agenda del Presidente. Se utilizanherramientas de análisis de redes sociales (SNA) para examinar las evidencias.Los resultados indican que el Ministerio de Salud no fue el principal canal deinformación del presidente al principio de la pandemia a pesar de su papel central en la estructura de gobernanza nacional de emergencia en salud pública.Además, revelan la elección del presidente de utilizar la presidencia como suprincipal soporte informativo, incluso fortaleciéndolo a través de sus poderes.