I’ve always been fascinated by primates: they’re so human-like in their gestures, expressions and behavior that it’s almost impossible not to feel empathy for them.   Unfortunately, there’s a wild yellow fever outbreak happening in Brazil, and primates are strongly affected by the disease. In wild yellow fever, mosquitoes of the genera Haemagogus and Sabethes transmit the virus and monkeys are the main hosts; In this situation, human cases occur when a non-vaccinated person enters a wilderness area and is bitten by a contaminated mosquito.