Other issues A 2020 review of social research on vaccination in Latin America found that about half of the research papers were about Brazil. A review of meningococcal vaccine use in Brazil from 2005 to 2017 found that the vaccination program lowered the number of cases of the disease while also the number of deaths from the disease did not change much. In 2018 Brazil began a large campaign to provide about 70 million people with the yellow fever vaccine. References External links Travel Health Notices - Brazil from the Centers for Disease Control Healthcare in Brazil Brazil