Vaccine hesitancy in Brazil: post-pandemic challenges and the use of artificial intelligence

Vaccine hesitancy is a global public health challenge, and its characteristics change according to the social and epidemiological context. This commentary seeks to stimulate debate on the dynamic nature of the definition and determinants of vaccine hesitancy, especially in the wake of the Covid-19 pandemic and the population's increased access to new forms of information-seeking, such as artificial intelligence. Scientific production on childhood vaccine hesitancy in Brazil before 2016 was focused on high-income families. After 2016, there was an increase in production on vaccine hesitancy, considering the World Health Organization's 2014 determinants model. After the start of the pandemic, there was a significant increase in studies on disinformation and the politicization of the vaccine. Currently, the use of generative artificial intelligence, which is increasingly common in the search for information on vaccines, is being considered.