Risk Perception and Misinformation in Brazilian Twitter during COVID-19 Infodemic - Rafael S. Medina Ferreira; Ana Paula Couto da Silva; Fabricio Murai (IEEE Intl Conf on Parallel & Distributed Processing with Applications, Big Data & Cloud Computing, Sustainable Computing & Communications, Social Computing & Networking, ISPA/BDCloud/SocialCom/SustainCom 2022, Melbourne, Australia, December 17-19, 2022, 2022)