See In the Amazon rainforest Vaccination versus yellow fever and taking anti-malaria medication could possibly be important if you are travelling to the Midwestern state of Mato Grosso or maybe the northern (Amazon) regions. Should you be arriving from Peru, Colombia or Bolivia, proof of yellow fever vaccination is needed https://wiki.multipurpose-wapuula.com/profile.php?user=ruth-brunker-146600&action=view