Which species is typically vaccinated to control zoonotic spread of Eastern Equine Encephalitis?

• A. Horses
• B. Cats
• C. Dogs
• D. Cattle

Answer: (A)

Vaccinating horses helps reduce human risk because horses are part of the transmission cycle for Eastern Equine Encephalitis and are frequently exposed in endemic areas. When horses are vaccinated, they’re less likely to develop significant viremia, which means mosquitoes are less likely to pick up the virus from an infected horse and pass it on to people. Other animals listed do not have routine vaccines for this virus and are not the focus for controlling transmission. So, the species typically vaccinated to help control zoonotic spread is the horse.