Please read the clinical scenario, and then answer question. Nancy has brought in her 75-year-old mother, Leah, into your ER because she has not been acting like herself. She has been using her hands less and less, complained of a severe headache, and then developed a severe tremor, high fever, and has now stopped talking. Her gait has also been affected. She reports a recent trip to the woods to go camping as a family. As Nancy is giving you the history, Leah collapses on the floor and has a seizure.

Multiple tests are performed, and it is discovered that Leah has Eastern equine encephalitis. What is the best initial treatment regimen?