Approximately 60% of people infected with the Oropouche virus become ill, experiencing symptoms of Sloth fever.

Yes, serious complications such as encephalitis and meningitis (inflammation of the brain and surrounding membranes) have occasionally been reported.  

Orthobunyaviruses are a group of viruses that includes the Oropouche virus, which is different from flaviviruses like dengue and alphaviruses like chikungunya.  

Sloth fever is not directly contagious between humans. It is transmitted through the bites of infected mosquitoes and biting midges.  

To prevent Sloth fever, avoid contact with mosquitoes and biting midges, and use insect repellent and protective clothing.