Orthobunyaviruses are a group of viruses that includes the Oropouche virus, which is different from flaviviruses like dengue and alphaviruses like chikungunya.
Approximately 60% of people infected with the Oropouche virus become ill, experiencing symptoms of Sloth fever.
Symptoms of Sloth fever include fever, severe headache, chills, muscle aches, joint pain, nausea, vomiting, and a rash.
“Sloth fever” is caused by the Oropouche virus and is formally known as Oropouche virus disease or Oropouche fever.