Yellow fever virus

A 47-year-old woman was admitted to the hospital after presenting to the emergency department for evaluation of headache, vomiting, and fever. Her symptoms began one day after returning from a trip to Uganda. She took chloroquine and proguanil for malaria prophylaxis before the trip. The patient becomes hypotensive, oliguric, and jaundiced on the second day of admission. Several days later, the patient died due to severe gastrointestinal hemorrhage. Testing reveals an infection with a virus that is endemic to parts of Africa and is transmitted via a mosquito. This virus has which of the following characteristics?