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

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

The CDC issued a warning due to the spread of the Oropouche virus in regions near the US and to advise caution for residents, especially those traveling to affected areas.      

The US CDC advises avoiding unnecessary travel to Brazil and Cuba due to the presence of the Oropouche virus.  

Sloth fever has been reported in South America, Central America, and the Caribbean.