Proposing debates about disinformation is challenging. Processes such as the Covid-19 pandemic or political-electoral scenarios reinforce the need to fight distortions and misinformation. When it comes to science and health, it becomes more relevant. Our objectives are to show the main types of misinformation and discuss their harmful consequences for the public in Brazil, the country this study focuses on. The methodological paths used are the literature review and the categorization of the types of misinformation identified in the country between 2020 and 2021. In the final considerations, we detail the widespread misinformation in the country and the growing number of mechanisms to face it.